[单选题]破碎机的（）一般用卡尺或铅块测量。
A.出矿口
B.排矿口
C.圆锥口

U.S. congressman and former entertainer Sonny Bono has died in a skiing accident at a resort in Nevada. Authorities confirmed Mr. Bono suffered head injuries and died immediately after hitting a tree. The body of the 62-year-old lawmaker was found Monday at the heavenly ski resort at Labe Tahol about 2 hours after he was reported missing.
Mr. Bono and his former wife Char were a popular rock-and-roll singing duo in the 1960s and 70s. Sonny and Cher sang the hit songs: The Beat Goes on, I Got You Babe and they hosted a top rated variety show on TV.
Sonny Bono entered polities in the 1980s as a conservative republican. He served one term as mayor of Palm Spring, California before winning a seat in the U.S congress in 1994. Press secretary Frank Conen says Sonny Bono made his mark on Capital Hill, Sonny Bono died at 62.

Methods of studying vary; what works (21) for some students doesn’t work at all for others. The only thing you can do is experiment (22) you find a system that does work for you. But two things are sure: (23) else can do your studying for you, and unless you do find a system that works, you won’t go through college. Meantime, there are a few rules that (24) for everybody. The hint is "don’t get (25) ".
The problem of studying, (26) enough to start with, becomes almost (27) when you are trying to do (28) in one weekend. (29) the fastest readers have trouble (30) that. And ff you are behind in written work that must be (31) , the teacher who accepts it (32) late will probably not give you good credit. Perhaps he may not accept it (33) . Getting behind in one class because you are spending so much time on another is really no (3
A. arrangements
B. way
C. assignments
D. class