应力变化反复的场合的管道采用法兰连接时，其连接法兰的形式为（）。

听力原文：M: Excuse me, I bought this watch last Saturday. I...

单项选择题听力原文：M: Excuse me, I bought this watch last Saturday. It's supposed to be waterproof, but it doesn't work now. I'd like my money back.
W: I completely understand, sir. But usually we don't give money back on reduced items. Maybe you can speak to the manager.
Q: What do we learn from the conversation?
(17)
A．The man bought the watch last Sunday.
B．The manager can give money back to the man.
C．The woman will speak to the manager about the matter.
D．The waterproof watch was bought in the period of promotion.

不能输送氢氟酸、热磷酸和强碱的非金属管包括（）。A.耐酸陶瓷管B.玻璃管C.铸石管D.石墨管

多项选择题不能输送氢氟酸、热磷酸和强碱的非金属管包括（）。

公司实行实地盘存制，审计师在复核公司的存货监盘备忘及相关审计工作底稿时，注意到以下情况。其中做法正确的是（）。...

单项选择题公司实行实地盘存制，审计师在复核公司的存货监盘备忘及相关审计工作底稿时，注意到以下情况。其中做法正确的是（）。