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I wonder if he______________(play) an important role in the play. Let’s wait and see.2．A bridge _ 1. I wonder if he______________(play) an important role in the play. Let’s wait and see. 2．A bridge ________________(put) up in one year. 3. Different kinds of CD-ROMs_____________(sell) in the shop and they__________(sell) well. 4. Nice________________(talk) to you. See you next time. 5. If you exercise every day, you’ll soon feel much_________________(health). 6. I hope that you are not feeling_________________(bore) about the documentary. 7. A young mother with her two twin sons_______________(play) on the playground now. 8. We were _______________(amaze) at the _______________(amaze) result. 9. We won’t go if it is_______________(rain) tomorrow. 10. I will _____________(give) some money if I get full marks in exams. But I will spend it_________________(wise).
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【简答题】如何将表格的边框线设置成细线?
【简答题】山顶洞人在工艺加工方面已经开始使用( )、( )、磨光、刻纹等技术,从而使工艺制作能初步符合人们的物质生活要求,并表现人们的审美要求。
【单选题】空心阴极灯的构造是
A.
待测元素作阴极，钨棒作阳极，内充氮气；
B.
待测元素作阳极，钨棒作阴极，内充氩气；
C.
待测元素作阴极，钨棒作阳极，灯内抽真空；
D.
待测元素作阴极，钨棒作阳极，内充惰性气体。
【简答题】必做题 当n≥1，n∈N * 时， （1）求证：C n 1 +2C n 2 x+3C n 3 x 2 +…+（n-1）C n n-1 x n-2 =n（1+x） n-1 ； （2）求和：1 2 C n 1 +2 2 C n 2 +3 2 C n 3 +…+（n-1） 2 C n n-1 +n 2 C n n ．
【单选题】空心阴极灯的构造是
A.
待测元素作阴极，铂丝作阳极，内充低压惰性气体
B.
待测元素作阴极，铂丝作阳极，灯内抽真空
C.
待测元素作阴极，钨棒作阳极，内充低压惰性气体
D.
待测元素作阴极，钨棒作阳极， 灯内抽真空
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