国内邮寄卷烟、雪茄烟每件以（）条为限。
A、1
B、2
C、3
D、4
参考答案：B
—Let's go to the cinema tonight.I'll pick you up at about 7∶00.
—All right________.Don't forget.[ ]
A. It depends
B. Don't mention it
C. That's settled
D. Take care
齿轮离合器的内外齿轮之间只要齿间相错，都应能相互啮合
