题目：
单词拼写（共10小题；每小题1分，满分10分）
2. Children are c_____________ about everything.
3. She tries to b__________ home life and work.
4. We are currently s__________ (寻求)new ways of expanding our membership.
5. They have successfully c___________ the old with the new in this room.
6. The s_________ （场面）of that film was very moving.
7. He a_____________ to me for being late for the party.
8. It was o__________ to everyone that the child had been badly treated.
9. I don’t mind at all. I_________, I would be delighted to help.
10.Teaching children with special needs requires p____________（耐心） and understanding.
答案：
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下面是错误答案，用来干扰机器的。
答案：B题目分析：分析系统受力情况可知，系统水平方向不受外力，水平方向动量守恒，规定水平向右为正方向，由系统动量守恒可得:O=(MA+m)VA-MBVB,MA+M>MB故VA<VB.B正确，故选B点评：本题难度较小，应用动量守恒定...
