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问题 解答题

56名同学去公园划船，把租来的3只大船和7只小船都坐满了．已知每只大船能比每只小船多坐2名同学，每只大船和每只小船各坐了多少人？

答案

设每只大船做x人，

3x+7×（x-2）=56，

3x+7x-14=56，

10x-14+14=56+14，

10x÷10=70÷10，

x=7，

7-2=5（人）；

答：每只大船可坐7人，每只小船可坐5人．

阅读理解
阅读下面的短文，然后根据短文内容选择最佳答案。
     One day little Mike's mother went to the river to do some washing. Before she left, she said to him,
"Mike, while I am away, stay near the door and watch it all the time!" She said this because she was afraid
of the thieves.
     Mike sat down beside the door. After an hour, one of his uncles came. He asked Mike, "Where is your
mother?" "She has gone to the river to do some washing," Mike answered. "Well," said his uncle, "now it is
a quarter to two. Three hours later we are going to visit your family.Go and tell her about it, for I'm too
busy. I have to hurry…"
     After his uncle had gone away, Mike began to think: Mother had asked me to watch the door all the time
and my uncle told me to go and tell my mother.
     "What shall I do?" he thought and thought. Finally he pulled down the door, put it on his back and went
to the river with it.
1. What did Mike's mother ask him to do while she was away?
[ ]
A. To wait for her.
B. To watch the house.
C. To look after the door.
D. To wait for his uncle.
2. How many uncles did Mike have?
[ ]

A. One.
B. Two.
C. Three.
D. We don't know.

3. What time did Mike's mother go to the river?
[ ]
A. 1:15.
B. 2:15.
C. 12:45.
D. 1:45.
4. When would Mike's uncle come to see them?
[ ]
A. In the evening.
B. In the morning.
C. In the afternoon.
D. At night.
5. What should Mike do?
[ ]
A. He should lock the door before he went to the river.
B. He should ask his uncle to tell his mother.
C. He should go to the river with the door.
D. He should make a telephone call to his mother.
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选择题

下列实验基本操作中，正确的是
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