Laboratory work is your chance to learn science first—hand. It can be fun but you must be careful to prevent injury.
Listen closely when your teacher reads and explains the rules before your first lab lesson.
| LABORATORY RULES |
|
| Throughout the lesson |
Do not enter the science lab without the teacher's permission. No food or drinks are to be allowed in the science lab. |
| Before the experiment |
Read all instructions carefully before every experiment. Prepare all apparatus(仪器) and arrange them so that you will not knock them over while doing the experiment. |
| During the experiment |
If you are not sure how to use any apparatus or how to operate, ask your teacher for help. Never smell or taste chemicals unless your teacher gives permission. |
| After the experiment |
Wash all apparatus after use and return them to the places where they were. Throw waste materials in proper waste baskets. |
| First aid |
Report all accidents to your teacher immediately. If you spill(溅出) any chemicals onto your body or clothing, wash with plenty of water and report to your teacher. |
根据材料内容选择最佳答案，并将其标号填人题前括号内。 Your teacher will probably tell you the rules above ______ the first lab lesson.
| A．before | B．since | C．during | D．after |
Before every experiment, you should ______ .
| A．taste the chemicals first |
| B．clean all the apparatus |
| C．read all instructions carefully |
| D．report all the accidents to the teacher |
When you are not sure how to use the apparatus, you should ______ .
| A．try them on your own |
| B．read the rules carefully |
| C．ask your teacher for help |
| D．put them back |
It is clear that you can ______ .
| A．bring food into the lab |
| B．enter the lab any time |
| C．smell chemicals as you like |
| D．learn science directly in the lab |
If you get chemicals on the clothing, which part can you find ways to solve it?
| A．Before the experiment | B．First aid |
| C．During the experiment | D．After the experiment |
Maybe a lot of thin people will be worried about their health if the inside fat matters．
Some doctors now think that the inside fat around important organslike the heart or liver could be as dangerous as the outside fat which can be noticed more easily．
"Being thin doesn' t surely mean you are not fat，"said Dr Jimmy Bell at Imperial College．Since 1994，Bell and his team have tested nearly 800people with MRI to create "fat maps" showing where people store fat．
According to the result，people who keep their weight through the food they usually eat rather than exercise are likely to have major deposits （堆积物） of inside fat，even if they are thin．
Even people with normal Body Mass Index （体重指数） scores can have surprising levels of fat deposits inside．Of the women，as many as 45percent of those with normal BMI scores （20to 25）actually had too high levels of inside fat．Men were nearly 60percent．
According to Bell，people who are fat on the inside are actually on the edge of being fat．They eat too many fatty and sugary foods，but they are not eating enough to be fat．Scientists believe we naturally store fat around the stomach first，but at some point，the body may start storing it elsewhere．
Doctors are unsure about the exact dangers of inside fat，but some think it has something to do with heart disease and diabetes （糖尿病）．They want to prove that inside fat does harm to the body' s communication systems．
The good news is that inside fat can be easily burned off through exercise or even by improving your eating habits．"If you want to be healthy，there is no other way．Exercise has to be an important part of your lifestyle，"Bell said．
（1）What is this piece of news mainly about？
| A． |
Thin people may be fat inside． |
| B． |
How to deal with inside fat． |
| C． |
Inside fat leads to many diseases． |
| D． |
Thin people also have troubles． |
（2）What does the underlined word " organs"in the second paragraph mean？
| A． |
地位 |
| B． |
地方 |
| C． |
器官 |
| D． |
肝脏 |
（3）Doctors have found ．
| A． |
the exact dangers of inside fat |
| B． |
being thin doesn' t mean you are not fat inside |
| C． |
being thin is not dangerous at all |
| D． |
inside fat is the cause of heart disease and diabetes |
（4）According to the passage，which of the following is wrong？
| A． |
Exercise can help to reduce the inside fat． |
| B． |
People can reduce inside fat by improving their eating habits． |
| C． |
Women have more chances to have too much inside fat． |
| D． |
Not all the people who look thin are really thin inside． |
（5）From the last paragraph，we can find that ．
| A． |
it is true that inside fat can lead to disease |
| B． |
exercise plays an important role in people' s life for keeping healthy |
| C． |
thin people usually have inside fat even if they are thin |
| D． |
it is easier to burn off inside fat than outside fat |
I'd planned to spend my weekend in the sun，planting flowers outdoors．But that was before the pair of crows （乌鸦）．Out of nowhere，they had set up their base camp in our garden．
We first discovered the crows on Friday morning．It was early，and the sound the birds made traveled through our neighborhood．I thought they' d go away soon．But，no．They were getting louder and probably made my neighbors angry nearly as much as us with the noise．I felt a little disappointed．
Then，on Sunday afternoon，I looked out of the kitchen window to see our dog Quatchi watching something on the ground．I found a small coal﹣black bird in the grass．Its eyes were milky，and it stayed perfectly still as my dog inched towards it．Only when Quatchi touched his nose to its head did it walk away．I grabbed the dog and locked him inside and came back with my camera．
I never thought that the young would be hanging out on the ground，growing and gaining strength as its parents guarded it from above．The second I saw this little bird I forgave （原谅） the crows．
To be honest，I' ve never been much of a bird person．I also have a healthy respect for birds．They' re basically living dinosaurs（恐龙）．
I wish they' d chosen another garden．There are only so many sunny days in Seattle，and I still can' t do any gardening out there．But I' m also thankful that I got to see this little bit of nature．It' s pretty amazing．
The experience has also strengthened my wish to create a beautiful garden that attracts lots of bees，butterflies，and yes，birds．They are welcome here．
（1）The arrival of the two crows ．
| A． |
angered the writer' s neighbors |
| B． |
made the writer' s dog mad |
| C． |
was harmful to the writer' s garden |
| D． |
broke the order of the writer' s life |
（2）Why did the writer lock her dog up？
| A． |
She wanted to take some photos． |
| B． |
The parent crows were to attack the dog． |
| C． |
She wanted to protect the little bird． |
| D． |
The dog kept making loud noises． |
（3）The writer changed her thoughts to the crows when ．
| A． |
she planted flowers in her garden |
| B． |
she locked her dog inside |
| C． |
she saw the little bird in her garden |
| D． |
she thought of living dinosaurs |
（4）After seeing the little crow，the writer ．
| A． |
was interested to know its growing progress |
| B． |
fell in love with the pair of crows |
| C． |
planned to drive the crows away |
| D． |
decided to help look after it |
（5）The passage is mainly to ．
| A． |
show an unpleasant situation |
| B． |
advise readers to protect birds |
| C． |
share a personal experience |
| D． |
ask advice on dealing with crows |
Little stream ran down from a high mountain through many villages and forests．Then it reached a desert，"I went through so many difficulties．I should have no problem crossing the desert，" she thought．As she started，she found herself slowly disappearing into the sand．After many tries，she still failed．"Maybe I can' t reach the ocean，" she said sadly to herself．
At this time，a deep voice said，"If a breeze （微风） can cross the desert，so can a river．"
It was the voice of the desert．But the little stream answered，"A breeze can fly，but I can' t．" "That' s because you can' t give up what you are．Let yourself evaporate （蒸发） into the breeze，and it can take you across，" said the desert．"Give up what I am now？ No! No!" The little stream could not accept this idea．"The breeze can carry the vapor （蒸汽） across the desert and let it leave as rain．The rain will form a river again，" said the desert．"And whether you are a river or vapor，your nature never changes．" Hearing this，the little stream went into the open arms of the breeze．It carried her to the next stage of her life．
The course of our lives is like the experience of the little stream．If you want to go through difficulties in your life to head for success，you should also change the way you are．
（1）The little stream planned to reach ．
| A． |
the forest |
| B． |
the river |
| C． |
the desert |
| D． |
the ocean |
（2）The little stream before she crossed the desert．
| A． |
didn' t meet any difficulties |
| B． |
was confident about herself |
| C． |
was worried about herself |
| D． |
knew well about the desert |
（3）At first，the little stream didn' t accept the desert' s advice because ．
| A． |
she failed many times |
| B． |
she was afraid of the nature |
| C． |
she wasn' t able to change her nature |
| D． |
she wouldn' t change the way she was |
（4）The little stream finally crossed the desert by ．
| A． |
evaporating into the breeze |
| B． |
forming a river |
| C． |
disappearing into the sand |
| D． |
changing her nature |
（5）What does the story mainly tell us？
| A． |
The road to success isn' t always easy and smooth． |
| B． |
Whatever others say，we should always be ourselves． |
| C． |
To succeed，we should think about things in a different way． |
| D． |
To succeed，we should follow others' advice． |
Our class had a weekly class meeting this week． We talked about how to deal with lies， hoates （骗局） or rumors（谣言）． Here are the stories some students told．
Zhang Wei： Yesterday my friend Jim went to school without his homework． He told his teacher that his dog ate it． It was just an excuse， he made it to cover the fact that he didn't do his homework． The teacher knew about that and made him stay to finish his homework after school． Sometimes we think we can avoid trouble by making excuses when we do something wrong， but we're really making the things worse．
Chen Ping： Last week I got a menage． It said， "A little girl called Julia has got brain cancer． The girl will get three cents from America Online each time this message is forwarded（转发）． So please be kind and forward this to everyone you know． If not， you will have bad luck for a year．" In fact， it is just one of the silly chain letters to cheat you and waste your time．
Xu Yan： A big earthquake hit Ya'an， Sichuan on April 20th． The earthquake was strongly felt by people in Chengdu． A rumor said Chengdu would be hit by a bigger earthquake in the coming days．
For the next several days， thousands of people camped outside their houses at night because of fear． Besides， many people rushed to buy food， water， medicine and so on． Some businessmen used people's fear of earthquake to help sell their goods at higher prices． Of course， nothing happened in the end．
（1）What's the weekly class meeting about？
（2）Why didn't Jim take his homework to school as a matter of fact？
（3）What does Chen Ping think of the chain letters？
（4）Where did many people in Chengdu camp at night when the rumor came？
（5）Who sold goods at higher prices after hearing the rumor？
Craig Kielburger was born in Canada on December 17th， 1982 and spent his childhood there． He often took part in sports， and he liked to help people． When Craig was twelve， he read a story in Toronto Star newspaper about a poor boy． The poor boy was killed because he fought for the rights of children． The poor boy was just twelve year old， too． After reading this article， Craig was so angry that he decided to help the children who should go to school instead of working in factories all day in some countries． So he gathered his friends and started a group the Twelve﹣Year﹣Olds． Soon many children joined them and they called the organization Free the Children． The organization has helped develop the education in Kenya， India， China and other countries． Today， they have built more than 700 schools and school rooms in these countries． They have also provided clean water， health care for more than one million people around the world．
|
Craig Kielburger and his organization |
|
|
What's the （1） of it |
Free the Children |
|
When he started it |
at the（2） of 12 |
|
Why he started it |
read a（3） about a poor boy who was killed knew many children in some countries couldn't go to school |
|
What it has done |
helped develop the education in some countries built（4） 700schools and school rooms （5） clean water and health care |