压紧填料时,应同时旋动阀杆,其目的是在保证密封良好前提下,可使阀杆转动灵活。
参考答案:对
By the end of last term, we _____ more than a thousand new words.[ ]
A. learned
B. have learned
C. had learned
D. will learn
灵官殿供奉有()。
A.王灵官
B.四大天王
C.四大金刚
D.四大元帅
E.四御