夜间出现的“太阳”，（）真的太阳。
A、当然是
B、绝对不是
C、可能是
参考答案：B
— If you are free, go skating with us, OK?
— ______. [ ]
A. Not at all.
B. Sure, I'd love to.
C. No, I don't like you.
D. That's right.
直接电位法的主要误差来源有哪些？应如何减免之？
