当某一用电设备给定瞬间的端电压为额定电压的1.1倍时电压偏差为（）。
A.5%
B.10%
C.-5%
D.-10%
参考答案：B
1. Mr. Sun can speak English very well, ________?
2. Let's finish the work as soon as possible, ________?
3. There won't be a football match tonight, ________?
4. He did little work, _______?
5. She usually has breakfast at 7 o'clock, ________?
6. Everybody saw him, ________?
7. I don't think she is good at dancing, _________?
担保是一种民事法律行为，担保活动应当遵循（）的原则。
A、平等
B、自愿
C、公平
D、合作
E、诚实信用
