Wind is the great maker of waves. There are exceptions (例外), such as the tidal (潮汐的) waves sometimes caused by earthquakes under the sea. But the waves most of us know are caused by winds blowing over the sea .
Now let’s learn some physical (自然地理学的) things about it. A wave has height, from low point to high point . It has length (长度)--the distance from this high point to that of the following wave. The period of the wave means the time it takes for succeeding high points to pass a fixed point. None of these things stays the same--for all depend upon (依靠)the wind, upon the depth (深度) of the water and many other matters.
The water that makes up a wave does not advance with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position (原先的位置). And it is lucky that this is so. For if the huge groups of water that make up a wave really moved across the sea, sailing would be impossible. If we want to find the speed of a wave, we may use the following way : Speed =" wavelength" × frequency (频率).
Here, wavelength is the distance between two high points , frequency means the number of cycles per second What causes waves?
| A．Earthquakes and nothing else. | B．Only wind. |
| C．Wind causes most waves. | D．Wind causes some waves. |
Which of the following is TRUE according to the passage?
| A．The water of a wave moves away across the sea. |
| B．The water of a wave remains almost at the same place. |
| C．The water of a wave goes with the passing of the wave. |
| D．The length of a wave means the distance from the top of a wave to the bottom. |
The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is 300, while its speed is twice that of Wave 1. Which of the following is right?
| A．The wavelengths of the two are equal. |
| B．The wavelength of Wave 1 is 10 times longer than that of Wave 2. |
| C．The wavelength of Wave 2 is longer than that of Wave 1. |
| D．The wavelength of Wave 1 is longer than that of Wave 2. |
Where can we find this passage?
| A．music magazine | B．fashion magazine | C．scientist magazine | D．sports magazine |
Here’s the weather report for some main cities from four continents(大洲).
| City |
℃ |
Weather |
City |
℃ |
Weather |
| Beijing |
29~35 |
cloudy |
Paris |
15~29 |
windy |
| London |
13~27 |
foggy |
Singapore |
25~30 |
shower |
| Moscow |
11~22 |
cloudy |
Sydney |
7~12 |
sunny |
| New York |
22~26 |
cloudy |
Tokyo |
23~27 |
rainy |
| A．Beijing. | B．London. |
| C．Paris. | D．Singapore. |
| A．Four. | B．Five. | C．Six. | D．Seven. |
| A．Sydney | B．Paris | C．London | D．Tokyo |
Hi！I'm Lucy. I am a student in Class 5，Grade 7.I have a big schoolbag. It is blue and red. The price is ￥88.1.have a nice pencil box in it. It is ￥10.Its color is white. I bought(买) it in a store. There are four pencils and one pen. Each pencil is ￥1 and the pen is ￥12.My eraser is yellow. The price is ￥2.My ruler is orange and very long. I like them very much. I study very hard. I am in Grade________.
| A．One | B．Seven | C．Three | D．Five |
My schoolbag is ________.
| A．big | B．small | C．lost | D．black |
What color is my pencil box？It's ________.
| A．red | B．blue | C．white | D．blue and red |
How much are my pencils?
| A．￥One. | B．￥Two. | C．￥Four. | D．￥Ten. |
The color of my eraser is ________.
| A．orange | B．black | C．yellow | D．blue |
Found:
A black pen is in the library. Is it yours? I am Lucy. E-mail me at lucy556@hotmail.com.
Lost:
I am Anna. I lost my computer game. It is blue. My telephone number is 471-4295. Call me! Thanks!
Lisa,
Is this your dictionary? Your name is on it. I found it in Classroom 6A.
Tom
Found:
I found a ring. It is nice. Please e-mail me at frank996@gmail.com.
Frank Lucy found a________ in the library.
| A．pen | B．computer game |
| C．dictionary | D．ring |
What color is Anna’s computer game?
| A．Black. | B．Blue. | C．Red. | D．Yellow. |
What is Anna’s telephone number?
| A．It’s 470-4294. | B．It’s 471-4295. |
| C．It’s 471-4394. | D．It is 470-4293. |
Tom found a dictionary in ________.
| A．Classroom 9A | B．Classroom 8A |
| C．Classroom 7A | D．Classroom 6A |
The dictionary may be (可能是) ________.
| A．Lucy’s | B．Anna’s |
| C．Lisa’s | D．Frank’s |
Tom: Good evening, Mum.
Mum: Good evening, Tom.
Tom: Do we eat chicken for dinner, Mum?
Mum: No, we eat fish and carrots, dear.
Tom: Mum, I don’t like carrots. I like chicken.
Mum: But we need more vegetables, not only meat(肉). It’s not healthy to eat chicken every day.
Tom: OK. But dad likes chicken, too.
Mum: Well, let’s eat chicken and tomatoes tomorrow.
Tom: That sounds great!
What do they eat for dinner?
| A．Chicken. | B．Carrots. |
| C．Carrots and fish. | D．Tomatoes. |
What does Tom want to eat for dinner?
| A．Fish. | B．Chicken. | C．Carrots. | D．Tomatoes. |
What do they need to eat more?
| A．Chicken. | B．Meat. | C．Vegetables. | D．Rice. |
Does Tom’s father like chicken?
| A．No, he doesn’t. | B．Yes, he does. |
| C．No, he does. | D．We don’t know. |
What will they eat tomorrow?
| A．Fish and carrots. | B．Chicken and carrots. |
| C．Tomatoes and chicken. | D．Fish and chicken. |
Whenever the sun dropped and the blue sky came up, my father and I used to climb the mountains near my house. Walking together, my father and I used to have a lot of conversations through which I learned lessons from his experiences. He always told me, “You should have goals like climbing the mountain.” Without the mountain-climbing that we both enjoyed, we couldn't have enough time to spend together because my father was very busy. I really got a lot from the mountain-climbing. It gave me time to talk with my father and to be in deep thought as well as develop my patience.
Once we climbed a very high mountain. It was so challenging for me because I was only ten years old. During the first few hours of climbing, I enjoyed the flowers and trees, and the birds' singing. But as time passed, I got a pain in both of my legs. I wanted to quit climbing, but my father said to me, “You can always see a beautiful sky at the top of the mountain, but you can't see it before you reach the top. Only there can you see all of the nice things, which is just like your life.”
At that time, I was too young to understand his words. But later after that, I got to know the meaning of hope in life. I found myself standing at the top of the mountain, and the sky was as clear as crystal.The underlined word “crystal” in the last paragraph means _________.
| A．岩石 | B．火焰 | C．水晶 | D．寒冰 |
Which of the following statements has the closing meaning to the underlined sentences in the second paragraph?
| A．You will get all you need at the top of the mountain. |
| B．On the top of the mountain, the sky is always as clear as a crystal. |
| C．You can find that life is full of nice things. |
| D．Never give up half-way. |
According to the last paragraph, we can infer that _________.
| A．the writer is very successful in his life |
| B．the writer reaches the top of the mountain |
| C．though the writer was young, he could understand his father |
| D．the writer used to give up when he faced trouble |
The best title for this passage is _________.
| A．Reaching the top of the mountain |
| B．Standing at the top of the mountain |
| C．Conversations between father and son |
| D．The advantages of climbing mountains |