问题 判断题

由土体自重力在地基内所产生的竖向有效应力称自重应力。

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     What do we do when we go camping? First, we work out a plan. We take food, clothing, a knife, and

 things for cooking and eating. We take things to keep us away from insects and the sun.  

     Then we put everything into the car and we drive to the woods. We look for a place for campers and

  we look for a good place for our tent, the place should have a lot of moving air. This will keep some

 insects away.  High land with water on both sides of it is good.  Then we put up our tent.  We put

 everything into the tent, and we are ready for fun. We can swim in the lake, walk in the woods, climb a

 mountain, row a boat, or go fishing.

    In the evening we come back to the tent, we build a big fire because it can keep the insects away. We

 sit around the fire and talk, we may tell interesting stories or we may sing songs.

    At night we lie down on the grass.  We can look up at the stars. It is a busy day, so we try to go to

 sleep early.

    Everything is dark. Everything is quiet.  We hope we won't hear music from the radio in the next tent.

 We hope it won't rain.

1. Before going to camp we should first _____.

    A. draw up a plan              

    B. take some food

    C. take things to keep us warm    

    D. take something for cooking and eating

2. We go to camp _____.

    A. by bus    

    B. by car    

    C. by bike    

    D. on foot

3. Campers can take part in _____ activities.

    A. one or two    

    B. only a few    

    C. many    

    D. two or three

4. In the evening we build afire because _____.

    A. it is cold at night            

    B. it can keep us warm

    C. it can keep the insects away    

    D.  it is dark and quiet

5. The campers like to_____ at night.

    A. hear music from the radio  

    B. go to sleep early  

    C. have rain    

    D. be busy

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