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【题目】听录音，选择正确的回答。（每小题读两遍10分）（1）A. It's fine.B. It's March.C .It's Friday. （2）A. How do you do?B .Nice to see you, too.C. Thank you.（3）A.We have three.B. There are three.C .We are three. （4）A.This is Mike speaking.B.I am Mike.C. It is Mike.  （5）He has some lessons.B. He is not at home.C .He's got a he

【题目】My school is not big but beautiful. There is a garden in the school. There are many flowers in the garden. The flowers are colorful, they are all kinds of colours. In the center（中心） of the garden, there is a pool. The fish are swimming in it. They look very happy and free.There are two teaching

【题目】一个做直线运动的物体受到的合外力的方向与物体运动的方向一致，当合外力增大时，则物体运动的加速度和速度的变化是A. 加速度不变    B. 加速度减小    C. 速度增大    D. 速度减小 【答案】C【解析】合力增大，根据牛顿第二定律知，加速度增大，因为合力方向与速度方向相同，速度增大．故C正确，ABD错误．故选C.