采煤工作面的作业规程队组每人学习时间不得少于（）小时A、8小时B、10小时C、12小 发布时间：2017-09-12 00:06 │ 来源：www.tikuol.com 题型：单项选择题 问题： 采煤工作面的作业规程队组每人学习时间不得少于（）小时A、8小时B、10小时C、12小时
题型：单项选择题 阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话，并将其字母标号填人题前括号内。 A. I'll take them. B. Can you go to other shops? C. I feel sorry about it. D. May I have a look at other shoes? E. How much are they? F. I'd like a pair of shoes for my daughter. G. She likes white and black. A: What can I do for you? B: __1___ A: For your daughter? Look, the shoes are really nice. Do you like them? B: Yes. But I'm afraid my daughter doesn't like the color. __2___ A: Sure. There are different kinds of shoes over there. What color does she like? B: __3___ And black is her favorite. A: What size does she need? B: Size 9. Let me see. Um, this pair of shoes must fit her. __4___ A: They are not expensive, only 199 yuan. B: That would be fine. _____ Here is the money. Thanks very much! A: You are welcome. 查看答案
题型：单项选择题 题13图所示电路中电压u含有基波和三次谐波，基波角频率为104rad／s。若要求u1中不含基波分量而将u中的三次谐波分量全部取出，则电容C1为应为（）μF。A.2.5B.1.25C.5D.10 查看答案
