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【单选题】
关于阀门安装要求的说法，错误的是______。A.
阀门手轮不得向下，避免操作
B.
落地阀门手上，不得歪斜
C.
在工艺允许的前提下，阀门手轮宜位于齐胸高，以便于启阀
D.
安装时，与阀门连接的法兰应保持平行，其偏差不应大于法兰外径的0.5%
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皮皮学刷刷变学霸
举一反三
【单选题】下列哪些不属于芝加哥学派的观点( )
A.
即使市场是垄断的或高度寡占，只要市场绩效是良好的，政府规制就没有必要
B.
高集中度产业中的高利润与其说是资源配置非效率的指标，倒不如说是生产效率的结果
C.
市场绩效或市场行为决定了市场结构
D.
有效的产业政策应该着眼于形成和维护有效竞争的市场结构
【单选题】There's ______water in the bottle. Don't throw it away.
A.
little
B.
a little
C.
a few
D.
few
【单选题】Don't throw your things everywhere. _____. [ ]
A.
Put it away
B.
Put away them
C.
Put away it
D.
Put them away
【单选题】—It’s _________ useful dictionary and you can’t throw it away . —Thank you . I didn’t know it before .
A.
a
B.
an
C.
the
D.
不填
【简答题】People didn't use to throw things away. They used to mend their clothes and reused them until they wore out. When they bought things, they used to carry shopping baskets. But now we don't reuse things...
【简答题】Consumers in developed countries throw away nearly half of their food purchases because they tend to buy in excessive quantities.
【单选题】She did not throw away the stockings until they were so ______ that they couldn't be mended anymore.
A.
wearing off
B.
worn out
C.
wearing out
D.
worn off
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