单级氨压缩机最大压缩比应不超过()。
A、5
B、6
C、8
D、10
参考答案:C
“Would you like to turn that music down? I’m writing a letter.” “_____.”
A.No, I’d like to
B.No, please
C.Yes, sorry.
D.Yes, I’d like it.
()是人类发展的终极诉求。
A、民主法治
B、公平正义
C、诚信友爱
D、人与自然和谐相处