问题
单项选择题
（）在全关或全开时，要回转1/4～1/2圈，避免拧得过紧，损坏阀件及误操作。
A.止回阀
B.球阀
C.截止阀
D.蝶阀
答案
参考答案：C
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（）在全关或全开时，要回转1/4～1/2圈，避免拧得过紧，损坏阀件及误操作。
A.止回阀
B.球阀
C.截止阀
D.蝶阀
参考答案：C
| 完形填空。 |
| Bruno is a young man of twenty. He's very 1 and likes sports. But he likes football 2 . He always plays football or watches football matches if he's 3 . One Saturday afternoon there was a football match. The young man was happy because he got a 4 . After lunch he went to the stadium (体育场). On his way there, 5 was wrong with his car. He had to stop 6 it.When he drove it again, he looked at his 7 and found there was only ten minutes left. He was 8 to be late for the match and drove fast. At the turning he didn't stop though (尽管) the lights were red. The 9 stopped him and asked, "Why didn't you wait for a few 10 ? Didn't you see the red lights?" "Yes, I did,sir," said Bruno. "But I didn't see you." |
| ( )1.A.tired ( )2.A.well ( )3.A.free ( )4.A.book ( )5.A.something ( )6.A.mend ( )7.A.car ( )8.A.excited ( )9.A.doctor ( )10.A.weeks | B.strong B.better B.busy B.map B.anything B.to mend B.hand B.sorry B.policeman B.days | C.thin C.best C.kind C.ball C.everything C.mending C.watch C.careful C.teacher C.hours | D.ill D.least D.safe D.ticket D.nothing D.mended D.foot D.afraid D.worker D.minutes |