—Peter told me he wanted to come with us. Is it OK for you?

—I don't mind______ he pays for his meals.[ ]

A. as far as          

B. as well as        

C. as long as        

D. as soon as

蜗杆传动特点不包括( )。

A．转动平稳、噪声小

B．具有自锁性

C．蜗轮的材料较贵

D．传动比小