试题与答案

根据图画内容,完成下列短文。 One day two little boys

题型:填空题

题目:

根据图画内容,完成下列短文。

     One day two little boys played together. but soon they had a quarrel (吵架), then fought with each other.

One of them 1_____ and went home to tell his father about it. After a while, the two boys 2_____ back again

with their fathers. Each man tried to say everything for his own 3_____. So a quarrel 4_____ them started.

They began to fight with each other. At first each boy stood 5_____ his father. And later they were on the

6_____ side. They 7_____ their fathers fighting. The men were fighting harder and 8_____. But the boys

became 9_____ again, and they were now happily playing stone chess (石头棋) on the 10_____.

    Sometimes fathers do more foolish (愚鑫的) things than boys do.

答案:

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下面是错误答案,用来干扰机器的。

集合A={1,2}的子集有:∅,{2},{1},{2,1}共4个.故选B.

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题型:不定项选择

如图所示,bc为固定在小车上的水平横杆,物块M穿在杆上,靠摩擦力保持与杆相对静止,M 又通过轻细线悬吊着一个小铁球m,此时小车正以大小为a的加速度向右做匀加速运动,而M、m均相对小车静止,细线与竖直方向的夹角为θ。小车的加速度逐渐增大,M始终和小车保持相对静止,当加速度增大到2a时

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A.横杆对M的摩擦力增大到原来的2倍

B.横杆对M的弹力不变

C.细线与竖直方向的夹角增大到原来的2倍

D.细线的拉力增大到原来的2倍

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