ToomuchTVwatchingcanharmchildr-优题课

Employees are being flooded with too much information that has little to do with their work, according to a new survey.
On average, white-collar workers spend 51 percent of their work time receiving and processing information. Only one third of it was relevant to their work, the survey found. Information overload for white collar workers has become a global issue. The huge amount of information has already affected their efficiency in management as well as their performance at work.
Buried with e-mails
Every morning, a secretary at the human resources department of an auto parts company opens her e-mail box, only to find it crammed with at least 50 unread mails. For her, even scanning through these e-mails every day takes at least half an hour. Some of her colleagues are not so lucky — they have to read at least 100.
Bothered with calls
Telephone calls are also causing a problem. More than 40 percent white-collar workers chose mobile phones as the preferred way to communicate important and urgent business matters.
Talking saves time and energy over the clicking, reading and replying to e-mails, but phone calls are also more distracting(分心的). While answering a call, a clerk is likely to put away a much more important task at hand and start the business being talked about on the phone.
Solution? Not yet.
Many companies start with providing staff with better computers, better Internet access and more advanced gadgets(装置). For example, staff members above a certain level in one company will be provided with a blackberry phone for easier access to their e-mails. The company has also organized many lectures on efficient ways of e-mail management. Yet most white-collar workers think their companies can do more.
What does the new survey find about white-collar workers?

A．They spend 51% of their work time on meetings.

B．Only half of the information they receive is useful.

C．Over 60% of them prefer to use the telephone.

D．Some of them have to read at least 100 e-mails every day.

Telephone calls cause a problem because ________.

A．they take up the time to receive and send e-mails

B．they are often not answered

C．they are mostly not about business

D．they may lead to the changing of work schedule

How do some companies try to solve the problem of information overload?

A．They start to give staff a pay rise.

B．They plan to employ more people.

C．They provide employees with more advanced equipment.

D．They organize lectures on how to reduce stress.

What is the major issue discussed in this text?

A．Poor management leads to inefficiency at work.

B．Junk mail is causing big trouble.

C．White-collar workers suffer from information overload.

D．Better computers are in need in workplaces.

If teens could reduce the salt they take in every day by 3,000 milligrams (mg), they would cut their risk of heart disease and stroke(中风) greatly in adulthood, researchers say.
Based on the results of a computer modeling analysis, researchers found that a 3,000 mg reduction in sodium(钠) by teenagers could reduce hypertension by 30 percent to 43 percent when they become adults.
Hypertension, or high blood pressure, is a common condition that may have no symptoms for years, but can eventually cause serious health conditions, including heart attack and stroke.
Other benefits over time as teens hit 50 years of age include a 7-12 percent reduction in coronary heart disease(冠心病), an 8-14 percent reduction in heart attacks, and a 5-8 percent reduction in stroke.
Fast food typically contains too much sodium. One bag of Nacho Cheese Doritos has 310 milligrams. Pizza is one of the biggest problems for teens when it comes to sodium, according to data from the National Center for Health Statistics.
“The additional benefit of lower salt intake early is that we can hopefully change the expectations of how food should taste, ideally to something slightly less salty,” says Dr. Kirsten Bibbins-Domingo, the lead author of the study and associate professor of medicine at the University of California, San Francisco.
“Most of the salt we eat is not from our salt shaker(盐瓶), but salt that is already added in food that we eat.” she added.
Which is a benefit of a low sodium diet according to the text?

A．No risk of heart disease.	B．Smaller chance of stroke.
C．Low blood pressure.	D．Slightly more heart attacks.

According to the text, 3,000 mg less salt intake daily will reduce hypertension by ________ in adulthood.

A．7%-12%

B．8%-14%

C．30%-43%

D．5%-8%

What does Dr Kirsten Bibbins-Domingo mean in the last two paragraphs?

A．A lower sodium diet can get teenagers used to less salty food.

B．A good eating habit can help teens have less junk food.

C．Teens should avoid pizzas and other salty foods.

D．We can add more salt from our salt shaker to the food.

Which of the following can be the best title for the text?

A．Teens Cutting Salt for Healthier Adulthood

B．Diet and Health

C．Sodium Brings Health Concerns

D．A Cause of Hypertension

As the forceful king of Macedonia(马其顿), Alexander the Great overthrew the Persian Empire, becoming a hero that would survive centuries after his death.
Born in 356 B.C., Alexander III was the son of Philip II and Olympias. Alexander’s parents wanted him to receive the finest education, and arranged for him to study under Aristotle, regarded as one of the greatest scholars.
Alexander’s father was a strong leader. Philip II built an impressive army and established the Macedonian kingdom; he was even planning to attack Persia shortly before his death.
In 336, Philip was murdered by one of his guards. Although it was obvious that the guard had a personal hatred, there are clues that other people were related to it.
After Alexander was cleared as a suspect, he succeeded his father without opposition, and killed those said to be responsible for his father’s murder, as well as all rivals. He was then just 20 years old. He then prepared to attack Persia.
In the spring of 334, Alexander led the army made up of nearly 50,000 soldiers into Asia, which is called “the most powerful military expedition ever to leave Greece”, He soundly defeated the Persian army at the Granicus River, sending a strong message to Darius III, leader of the Persian Empire.
In 333, Alexander faced Darius at Issus, a mountain pass. The Macedonian army was greatly outnumbered but able to work the narrow mountain passageway to their advantage. Darius managed to escape. Continuing down the Mediterranean Coast, Alexander took every city in his path.
In 332 Alexander declared Egypt to be part of the Greek Empire and was crowned Pharaoh(法老).
When Alexander left Egypt in 331, he defeated the Persians again and was crowned leader of Asia.
In 323, however, Alexander developed a fever on the way back home and died 10 days later at Babylon. He was just 33 years old.
What can we know about Philip’s death?

A．He was killed by someone intending to take power from him.

B．Alexander sent someone who hated Philip to kill him.

C．His death was related to his plan of fighting Persia.

D．The murder might be organized by a group of people.

The Macedonian army could defeat the Persians at Issus mainly because _________.

A．Darius didn’t command his army in the battlefield

B．Macedonian soldiers were more than the Persian soldiers

C．Macedonian soldiers could fight better at the mountain pass

D．Macedonia was more powerful than the Persian Empire

In which order did Alexander do the following things?
a．Totally overthrew the Persian Empire.
b．Defeated the Persian army at Issus.
c．Was crowned Pharaoh of Egypt.
d．Defeated the Persian army at the Granicus River.
e．Became the leader of Macedonia.

A．e, d, b, c, a	B．d, e, a, c, b
C．e, b, d, c, a	D．d, a, c, e, b

According to the passage, we can infer _________.

A．Aristotle taught Alexander how to defeat other nations

B．Alexander was happy about his father’s death

C．Persia is tougher to defeat than Egypt

D．Macedonia soon declined after Alexander died

It is six o’clock in the morning. You are asleep in my left arm and I am learning the art of one-handed typing. Your mother, more tired yet more happy than I’ve ever known her, is sound asleep in the room next door.
When you’re older we’ll tell you that you were born in Hong Kong in the lunar year of the pig. “It's a boy, so lucky,” our neighbours told us. They said you were the first baby to be born in the block this year. This, they told us, was good Feng Shui, in other words, a positive sign. Naturally your mother and I were only too happy to believe that.
Your coming has turned me upside down and inside out. I am pained by the memory of each suffering child I have come across on my journeys as a journalist. To tell you the truth, it’s nearly too much for me to even think of the children being hurt and abused and killed.
Last October, in Afghanistan, when you were growing inside your mother, I met Sharja, aged twelve, motherless, fatherless, guiding me through the grey ruins of her home. Everything was gone, she told me.
There is another memory of Rwanda, and the churchyard where I found a mother and her three young children huddled(蜷缩) together where they’d been beaten to death. The children had died holding on to their mother.
Daniel, these memories explain some of the protectiveness I feel for you, and the occasional moments of blind terror when I imagine anything bad happening to you.
We can see that this text is written to ________.

A．the author’s wife	B．the author’s neighbour
C．Daniel	D．a suffering child

The author mentions some of his painful memories because ________.

A．he wants his son to care for others

B．he feels more pain thinking about them as a father

C．he hopes to forget the tragedies he witnessed

D．his experience has affected his mental health

The underlined word “blind” in the last paragraph means ________.

A．unable to see	B．meaningful
C．not clear	D．not based on reason

Which of the following words best describes the author’s feeling when typing this text?

A．Relieved.

B．Regretful.

C．Loving.

D．Calm.

Going to school means learning new skills and facts in different subjects. Teachers teach and students learn, and many scientists are interested in finding ways to improve both teaching and learning processes.
Sian Beilock and Susan Leving, two psychologists at the University of Chicago, are trying to learn about learning. In a new study about the way kids learn math in elementary school, Beilock and Levine found a surprising relationship between what female teachers think and what female students learn: If a female teacher is uncomfortable with her own math skills, then her female students are more likely to believe that boys are better than girls at math. “If these girls keep getting math-anxious female teachers in later grades, it may create a snowball effect on their math achievement,” Levine told Science News. The study suggests that if these girls grow up believing that boys are better at math than girls are, then these girls may not do as well as they would have if they were more confident.
Just as students find certain subjects to be difficult, teachers can find certain subjects to be difficult to learn—and teach. The subject of math can be particularly difficult for everyone.
The new study involved 65 girls, 52 boys and 17 first-and second-grade teachers in elementary schools in the Midwest. The students took math achievement tests at the beginning and end of the school year, and the researchers compared the scores.
The researchers also gave the students tests to tell whether the students believed a math superstar had to be a boy. Then the researchers turned to the teachers: To find out which teachers were anxious about math, the researchers asked the teachers how they felt at times when they came across math, such as when reading a sales receipt. A teacher who got nervous looking at the numbers on a sales receipt, for example, was probably anxious about math.
Boys, on average, were unaffected by a teacher’s anxiety. On average, girls with math-anxious teachers scored lower on the end-of-the-year math tests than other girls in the study did. Plus, on the test showing whether someone thought a math superstar had to be a boy, 20 girls showed feeling that boys would be better at math—and all of these girls had been taught by female teachers with math anxiety.
According to surveys done before this one, college students who want to become elementary school teachers have the highest levels of anxiety about math. Plus, nine of every 10 elementary teachers are women, Levine said.
Sian Beilock and Susan Levine carried out the new research in order to ___________.

A．know the effects of teaching on learning	B．study students’ ways of learning math
C．prove women teachers are unfit to teach math	D．find better teaching methods for teachers

The underlined part in paragraph 2 most probably means that girls may ___________.

A．end up learning math anxiety from their teachers	B．study the ways their female teachers behave
C．have an influence on their math-anxious female teachers
D．gain unexpected achievement in such subjects as math

In the study, what were the teachers required to do?

A．Prepare two math achievement tests for the students	B．Tell their feelings about math problems
C．Answer whether a math superstar had to be a boy	D．Compare the students’ scores after the math tests

What is the finding of the new study?

A．No male students were affected by their teachers’ anxiety

B．Almost all the girls got lower scores in the tests than the boys

C．About 30% of the girls thought boys are better at math than girls

D．Girls with math-anxious teachers all failed in the math tests

Which of the following is TRUE according to the text?

A．117 students and teachers took part in the new study

B．The researchers felt surprised at the findings of their study

C．Beilock and Levine are interested in teaching math

D．Men teachers are better at teaching math than women teachers