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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 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. This empty box must fall over, because 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 in the bottom of this box. It will not fall, because its center of gravity is above its bottom.

小題1:If the bottom of an object is ______ its top, it will fall over easily.
A.lighter thanB.heavier thanC.no heavier than  D.as heavy as
小題2:Please point out which box will not fall.

小題3:The main idea of the passage is _________.
A.why things fall over    B.a low center of gravity
C.a high center of gravity  D.that everything has weight

小題1:A
小題2:C
小題3:A

小題1:根據文章內容If the top of an object is heavier than its bottom, it will fall over easily.可推測答案為A
小題2:根據常識內容可知答案為C
小題3:根據文章內容大意可知為A
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科目:初中英語 來源:不詳 題型:閱讀理解

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科目:初中英語 來源:不詳 題型:閱讀理解



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科目:初中英語 來源:不詳 題型:閱讀理解

閱讀下面短文,根據所讀內容,在文章后小題的空格里填入一個最恰當?shù)膯卧~。
注意:每個空格只填一個單詞。
It seems school children all over the world complain about their school food. Cherie Blair, wife of former British Prime Minister Tony Blair, said that she would prepare a packed lunch for her son if school dinners do not improve. So what do students of your age eat for lunch at school?
Japan
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United States
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Australia
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Japan
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Some children   3  food from their homes.
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United States
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   7 
School shops   8  students with traditional dishes.
The sale of green-labelled foods is served every day,   9  Red-labelled foods are sold once a week.
South Africa
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科目:初中英語 來源:不詳 題型:閱讀理解


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科目:初中英語 來源:不詳 題型:完形填空


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In a   9 , to keep   10  eyesight, we must have good studying habits.
小題1:A. importance  B. experience  C. difference
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小題8:A. him         B. us          C. you
小題9:A. word        B. sentence    C. letter
小題10:A. bad         B. good        C. Weak

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