题目
题型：期中题难度：来源：
sit, gravity holds you down. When you lie down, gravity holds you to the bed.
We know gravity is everywhere even though we can"t see it.We know it pulls on every stone and every
drop of water. It pulls on everything.
The gravity of the earth pulls everything towards the center of the earth.You know this when you try to
lift a heavy stone. Gravity pulls it down. The more the stone weights, the more gravity pulls on it. To lift
the stone, you must pull up harder than gravity pulls down.
The earth has gravity and the moon also has gravity. The moon has less gravity than the earth has. This
means the moon"s gravity does not pull as hard as the earth"s gravity.
Do you weigh 60 kilograms? That means the pull of the earth"s gravity on you is 60 kilograms. If you
were on the moon, you would weigh only 10 kilograms. The pull of the moon"s gravity on you would be
only 10 kilograms.
A. 物体质量
B. 物体重量
C. 万有引力
D. 宇宙能量
答案
核心考点
试题【阅读理解。 When you run downhill, gravity pulls you. When you throw a ball up, gr】；主要考察你对教育文化类等知识点的理解。[详细]
举一反三
moon in the night.
The sun is much bigger than the earth, and the earth is bigger than the moon. So the sun is the biggest
and the moon is the smallest. The earth goes round the sun day and night. It goes at 30 kilometers a second.
The moon is our satellite (卫星). It is also our neighbor. It goes round the earth all the time. The moon
goes at 8 kilometers a second. The moon can"t give out light or heat itself, and nothing can live on it.
Men live on the earth. It is going round itself all the time. The earth gives us lives, food, water and so on.
We must get on well with it.
根据短文内容，补全下面句子（每空一词）。
1. The sun is the b______of the three.
2. The e______ is bigger than the moon, but s______than the sun.
3. The m______ goes round the earth.
4. We can see the moon in the n______.
5. Men must get on w______ with the earth
That"s good!It"s good to write something for people to read!But they should know that they need to be
good readers first before they are really good writers. They should read a lot of books, instead (代替) of
watching TV and spending a lot of time playing games when they are free.
There is more fun in reading, you want to look for more books to read.
Before you decide (决定) to be a good writer, you"d better say to yourself, "I must read more and
more!"
B. it is good to write something for people to read
C. reading can be helpful for us to become a good writer
D. writers like to read more books for fun
That"s good! It"s good to write something for people to read! But they should know that they need to be
good readers first before they are really good writers. They should read a lot of books, instead (代替) of
watching TV and spending a lot of time playing games when they are free.
There is more fun in reading, so you want to look for more books to read.
Before you decide to be a good writer, you"d better say to yourself,"I must read more and more!"
B. it is good to write something for people to read
C. reading can be helpful for us to become a good writer
or you waste either the time or the money. The following are the ways of studying.
The best time for reading is morning, because in the morning, the air is fresh and the mind is clear. For
that reason, we can get good result.
In studying we must have patience (耐心). If we have not known a text well, we must read it again.
We should not read the next one till we have learned the first one.
When we are studying, we must put our hearts into the book, or we can get nothing from the book
while we are reading.
We must always ask "whys". If it is not well understood, write it down and ask our teachers or our
parents, or friends. In any possible way, we must know it completely and what we"ve learned can be used
well and made better.
Though there are many ways for studying, yet the above mentioned (提到的) will be quite enough if
we can keep them in heart and do so.
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B. to read in the morning
C. to pay attention to the ways of studying
D. to have patience in studying
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