商务印书馆()年由()创办于上海。
A.1897
B.1905
C.1912
D.1917
E.张元济
F.夏瑞芳等
G.蔡元培
参考答案:A, F
压缩机经过( )h的试运转,如无异常,各项参数都达到要求控制的范围,即可按正常步骤处理停车。
A.8~12
B.10~16
C.4~6
D.12~16
We all know Liuqian. He his magic shows. [ ]
A. is good at
B. is weak at
C. is famous as
D. is famous for