问题
单项选择题
电力系统中以“kWh”作为（）的计量单位。
A、电压
B、电能
C、电功率
D、电位
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
电力系统中以“kWh”作为（）的计量单位。
A、电压
B、电能
C、电功率
D、电位
参考答案：B
| 选择下列词汇或短语完成下面对话。 | |
Kevin: I couldn't _________(1) asleep last night. Tony: Why? Did you watch the World Cup last night? Kevin: No, maybe it's ________ (2) the coming final exam. I can't sleep well before exams. Tony: I think you are too ________(3) about exams. You should try to relax yourself. Kevin: What should I do? Tony: You can listen to some soft ________(4) before you go to bed. Or you can take a walk. Kevin: Thanks for your ________(5). I will try it tonight. Tony: You're welcome. |