在数控机床上加工工件，精加工余量相对于普通机床加工要（）。
A.大
B.相同
C.小
D.以上均不对
参考答案：C
When _____ his view about his job as a teacher, Mike said he found it very interesting and rewarding.
A．asking
B．asked
C．having asked
D．to be asked
根据我国有关法规，申请外商投资旅行社的中国投资者在申请前三年每年外联人数应达到( )。
A．1万人天 B．2万人天C．3万人天 D．4万人天
