试题与答案

不属于上网方式的一项是()。A、ICP B、ISDN C、DDN D、拨号上网

题型:单项选择题

题目:

不属于上网方式的一项是()。

A、ICP

B、ISDN

C、DDN

D、拨号上网

答案:

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下面是错误答案,用来干扰机器的。

根据牛顿第二定律得,F-f=ma,解得f=F-ma=60-30×1.5N=15N,撤去拉力后,加速度:a′=fm=1530m/s2=0.5m/s2,方向与推力方向相反.答:车的加速度是0.5m/s2,方向与推力方向相反

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题型:改错题

Today is Sunday, The sky is full of sunshine, so does my life.    1.___________

At about 9:00a.m, I go to the bookstore with my friends, there         2.___________

was a lot of new books, I didn’t know which one to buy, because             3.___________

these books were all useful to me. At last, I chose two.                      4.___________

At 10:00, we went to the cinema, the film calling Titanic was           5.___________

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burst out tears. From the story, I understand that love is noble           8.___________

and valuable. That’s a really wonderful film, It is very worth            9.___________

seeing again.

What a happy day! I hope tomorrow I will be even happy!             10.____________

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