卧式活塞压缩机的优点是()。
A、转速不能提高
B、基础庞大
C、维修方便
D、改型容易
参考答案:C
十二经脉中,入耳中的经脉有哪几条?试述其入耳中的支脉的循行。(原文、白话文皆可)
There will be _____ jobs for people in the future, because more robots will do the same jobs as people.
A. many B. less C. fewer