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【单选题】
IS型离心泵更换叶轮时需要拆卸泵的( )
A.
泵的前盖
B.
泵的后盖
C.
吸入管道
D.
排出管道
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参考答案:
举一反三
【单选题】关于人工喂养,下列哪种说法不正确
A.
新生儿应用稀释的牛乳喂养
B.
加糖是为了增加甜味,使婴儿更易接受
C.
奶类应煮沸消毒后进行喂养
D.
食量有一定程度的个体差异
E.
最好分次配制
【单选题】Be careful to hurt.
A.
avoid being
B.
avoid be
C.
avoid been
【单选题】She asked me ____ knock off the glass. [     ]
A.
please be careful not to
B.
to be careful not to
C.
to be careful to not
D.
not to be careful to
【单选题】轿车空调制冷系统制冷效果不足故障的原因是( )
A.
膨胀阀开度过大
B.
高、低压侧压力均低
C.
电磁离合器无法接合
D.
空调压缩机润滑油不足
【单选题】He often tells the children _____ when they play water sports. [     ]
A.
be careful
B.
to be careful with
C.
to be careful
D.
not be careless
【单选题】轿车空调制冷系统制冷效果不足故障的原因是( )
A.
膨胀阀开度过大
B.
高、低压侧压力均低
C.
电磁离合器无法结合
D.
空调压缩机润滑油不足
【判断题】我每天都给妈妈打电话。 这句话中的动词用现在时。
A.
正确
B.
错误
【单选题】—Be careful not to drop the Tang Dynasty vase . —Yes , we can’t be .
A.
too careful
B.
very careful
C.
too careless
D.
careless enough
【单选题】It's important ______ fire. [     ]
A.
to care
B.
be careful
C.
to be careful
D.
to be careful with
【单选题】What did Helen have to be careful to hide?
A.
Her lack of interest in history.
B.
Her low opinion of her husband's writing.
C.
Her dislike of her husband's admirers.
D.
Her inability to understand his books.
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