题目列表(包括答案和解析)
p_ _nt sp_ _k p_ _n_
sw_m_ _r? ch_ldr_n k_d s_ _mer? c_ _p dr_m
tr_mp_t? vi_l_n m_s_c_an
m_ _be? t_lk?
阅读理解
Every object has weight. But the center of its weight is not always in the middle of the object, If the top of an object is heavier than its bottom, it will fall over easily. We say that its center of gravity
(引力)is high. But if the bottom is heavier, it won't fall easily. Then we say that its center of gravity is low.Look at the first picture, lifts empty box must fall over, bemuse its center of gravity (C) is not above the line of its bottom (AB).
Now look at the second picture. There is some heavy iron at the bottom of this box. It will not fall, because its center of gravity is above its bottom.
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(1) Please point out which box will not fall?
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(2) From the passage, we can infer that the Leaning Tower of Pisa does not fall is because_______.
[
]A
.the top of the tower is heavier than its bottomB
.the bottom of the tower is not heavier than its topC
.its center of the gravity is still above the line of its bottomD
.its center of the gravity is not above the line of its bottom(3) If an object has a low center of gravity, _______.
[
]|
A .it won't fall |
B .it won't fall easily |
|
C .it is certain to fall over |
D .its top must be heavier |
(4) Which of the following is TRUE according to the passage?
[
]A
.The center of the weight is always in the middle of the objectB
.The center of the weight is always on the objectC
.The center of gravity is not always in the middle of the objectD
.The center of the gravity is always high(5) The passage is mainly about _______.
[
]|
A .why things fall over |
B .a low center of gravity |
|
C .a high center of gravity |
D .that everything has weight |
Reading Comprehension
A barn owl(猫头鹰) silently flies at night through the dark forest. Suddenly, the large bird hears a mouse running through the leaves. The bird quickly changes its flight path, drops down, and scoops up(抓起) the mouse in its talons(猛禽的爪). Another meal has been successfully captured.
How is the barn owl able to pinpoint the location of the mouse in the dark? Credit(把…归功于) the bird' s excellent hearing and its ability to determine the exact location of the source of a sound.
According to a recent study at Stanford University, a barn owl learned how to pinpoint the location of a sound source when it was only about two weeks old. The owl did this by noting the difference in the time it took a sound to reach each ear and in the difference in the loudness of the sound in each ear.
In another test, three young barn owls were given eyeglasses when their eyes were just beginning to open. The lenses(镜片) in the glasses distorted(使变形) a scene so that an object an owl was looking at seemed to be 20 degrees to the left of its actual position.
The scientists found that whenever one of the young owls heard a sound, it would look at a spot 20 degrees to the left of the sound source. Thus, the scientists concluded, the owls learned at a very young age how to locate the source of a sound.
1.What is the reason for the barn owl to successfully catch the mouse?
[ ]
A.It has very good eyesight at night.
B.It has very sharp hearing.
C.It is very good at determining the location of the sound.
D.Both B and C.
2.According to a recent study, a barn owl learned how to ________ when it was only about two weeks old.
[ ]
A.fly fast without sound
B.catch the mouse with its talon
C.locate the sound source
D.open its eyes wider
3.What do the words “to pinpoint the location” in the second paragraph mean?
[ ]
A.To find the exact position.
B.To notice the particular smell.
C.To recognize the real shape.
D.To hear the sound clearly.
4.Why did one of the young owls, after hearing a sound, look at a spot 20 degrees left of the sound source?
[ ]
A.It was too young to find the correct spot.
B.It was used to looking at the spot 20 degrees to the left of an object.
C.It was a mistake often made by this young owl.
D.It was wearing eyeglasses which distorted the object.
5.What is the main idea of the passage?
[ ]
A.How did the scientists train the owls to catch mice at night?
B.Why can eyeglasses help owls to catch mice?
C.Scientists used eyeglasses to make owls see better.
D.Why can owls catch mice at night?
| A.children | B.teachers | C.parents | D.doctors |
| A.“Listening and speaking skills” | B.“Reading and writing skills” |
| C.“Listening and writing skills” | D.“Reading and listening skills” |
| A.“Listening to the radio every day” | B.“Listening to your children read” |
| C.“Reading to your children each night” | D.“Talking about your children’s writings” |
| A.5 books | B.10 books | C.15 books | D.20 books |
| A.draw pictures or take photos | B.listen to pop music |
| C.write diaries or book reviews | D.play computer games |
| A.children | B.teachers | C.parents | D.doctors |
| A.“Listening and speaking skills” | B.“Reading and writing skills” |
| C.“Listening and writing skills” | D.“Reading and listening skills” |
| A.“Listening to the radio every day ” | B.“Listening to your children read” |
| C.“Reading to your children each night” | D.“Talking about your children’s writings” |
| A.5 books | B.10 books | C.15 books | D.20 books |
| A.draw pictures or take photos | B.listen to pop music |
| C.write diaries or book reviews | D.play computer games |
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