What’s the polite answer when someone asks you, “Do you mind if I sit with you?”
A. No, not at all.
B. Yes, I do.
C. Well, I don’t know.
D. You may ask someone else.
查看答案
What’s the meaning of the sentence “Take a leaf out of Li’s book!”?
A. Plant trees for Li.
B. Follow Li’s example.
C. Ask Li to write a book.
D. Keep a lot of leaves for Li.
辅助变流器只有单辅助变流器（）
A. 对
B. 错
动车组采用的是复合制动方式（）
A. 对
B. 错
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