下列符号所表示的各液压元件中,()不属于压力控制阀。
A.
B.
C.
D.
参考答案:B
解析:选项A为压力继电器;选项B为液控单向阀(方向控制阀);选项C为溢流阀;选项D为减压阀。
阅读下面对话。从方框内七个选项中选出五个恰当的句子完成对话,并将其番号填入对应的横线中。
Rick:Hello! 小题1:
Gina:Hello! This is Gina speaking.
Rick: 小题2:
Gina:Yes. I have nothing to do.
Rick:Can you go to the movie with me?
Gina: 小题3:
Rick:Let’s go to Movie Palace. It’s close to home.
Gina:But it doesn’t have comfortable seats.
Rick: 小题4: It’s the best theater in town.
Gina: 小题5: Let’s meet at the front gate of the cinema at eight. OK?
Rick:OK. See you.
Gina:See you.
芦根的功效是()。
A.清热泻火
B.生津止渴
C.除烦
D.止呕
E.利尿