问题
多项选择题
临时用电施工组织设计的内容和步骤应包括()。
A、现场勘察
B、进行负荷计算
C、绘制电器平面图、立面图和接线系统图
D、确定电源进线及线路走向
E、不需制定安全用电措施和电气防火措施
答案
参考答案:A, B, C, D
临时用电施工组织设计的内容和步骤应包括()。
A、现场勘察
B、进行负荷计算
C、绘制电器平面图、立面图和接线系统图
D、确定电源进线及线路走向
E、不需制定安全用电措施和电气防火措施
参考答案:A, B, C, D
从II 栏中找出与I 栏中问句相对应的答语。 |
I ( )1. What date is it? ( )2. Where are my shoes? ( )3. Is she going to the zoo? ( )4. Did you have a good time last Saturday? ( )5. When's your birthday? ( )6. When did Jim play the violin? ( )7. Whose gloves are bigger, yours or his? ( )8. What would you like as a birthday present? | II A. I'd like a Japanese cartoon. B. His, I think. C. It's on the 10th of September. D. Yesterday afternoon. E. No. She's going to the park. F. Yes, I did. G. It's the third of March. H. Behind the door. |
为研究某一镁铝合金的成分,进行甲、乙、丙三组实验.三组各取30mL同浓度的盐酸溶液,加入该种镁铝合金粉末.每组实验加入合金质量和产生气体质量的有关数据如下:
实验序号 | 甲 | 乙 | 丙 |
合金质量(g) | 0.255 | 0.385 | 0.495 |
气体质量(g) | 0.025 | 0.03 | 0.03 |
(1)甲组实验中,盐酸______(填“过量““适量”或“不足量”),乙组实验中,盐酸______(填“过量”“适量”或“不足量”).
(2)合金中镁、铝的质量比______.