如图是某复杂电路的一部分,A、B两点间的电位差为()V。
A.10
B.6
C.-5
D.0
参考答案:C
解析:
P点的电位应当与地等电位为0V。
选择合适的单词,并用其适当形式完成句子。
final, finally
1._____, we climbed to the top of the mountain.
2. We won the football game! The_____score was 3 to 2.
noise, noisy, noisily
3. It’s very_____here. I can hardly hear you.
4. I hate the loud_____outside. It’s driving me crazy.
5. How can I study for my tests? My little sister is crying_____in the living room.
possible, possibly, impossible
6. Could you_____help me to solve the problem?
7. Students with so much homework to do find it_____to do things like volunteering on weekends.
8. There is enough time. I think it is_____for us to finish the work by noon.
worry, worried
9. Don’t_____. We have plenty of time.
10. I’m not_____about her - she can take care of herself.
ASHA指标是
A.评价人口健康的生理学指标B.评价人口健康的心理学指标C.评价人口健康的生存健康指标D.评价人口健康的生命长度指标E.评价人口健康的综合指标