How do you do? Glad to meet you.()
A. Fine. How are you?
B. How do you do? Glad to meet you, too.
C. How are you? Thank you!
D. Nice. How are you?
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下列植物为球根花卉的是()
A. 美人蕉
B. 矮牵牛
C. 三色堇
D. 一串红
锂电池的作用是在程控系统失电时保存存储器内的()。
有调零装置的精密表,调零范围应不小于测量范围的()
A. 1%
B. 2%
C. 3%
D. 4%