V带传动的张紧轮应装在（）
A．松边内侧靠近小轮处
B．松边外侧靠近小轮处
C．松边内侧靠近大轮处
D．紧边内侧靠近大轮处
参考答案：C
一 Would you mind sweeping the floor?
一 _____. [ ]
A. Yes, of course
B. OK. You're right
C. Sorry. I'll do it right away
D. Not at all. Here you are
跌水和陡坡的区别
