单项选择题 听力原文：W: Those pants look cool on you. Would you like to buy them now?M: Well, honestly, I'm not sure. They fit me well on the hips, but they're a little tight at my waist. Meanwhile, the price isn't as fair as what I expected.Q: What does the man mean?(15)A．He thinks the pants fit him at the waist.B．He thinks the pants are a little tight on the hips.C．He thinks the price is reasonable.D．He doesn't feel like buying the pants.

单项选择题 听力原文：W: How careless I am! I lost the algebra textbook I've been using in the library. I'd better buy a new one as the final exam is round the corner.M: Well, if I were you, I'd call Lost-and-Found first since there must be important notes on the old one.Q: What does the man suggest the woman to do?(16)A．To look for the lost textbook in the library.B．To call Lost-and-Found first before buying a new one.C．To buy a new textbook since the final exam is coming soon.D．To borrow a textbook on which there're notes taken already.

单项选择题 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（）。