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【简答题】
敞开式组合电器被组合的电器有（ ）、电缆终端等，有时包括同类隔离开关和断路器。
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反馈参考答案：
举一反三
【单选题】（ ）用来阻止水流的反方向流动。安装时主意方向性，不可装反。主要用于水泵出口、水表出口等处。适用于输送清洁介质，对于带固体颗粒和粘性较大的介质不适用。
A.
止回阀
B.
闸阀
C.
浮球阀
D.
蝶阀
【简答题】Mary and Her Friends Mary has some friends. They are Betty, Peter, Alice and Mike. Mary is the oldest of the five. Betty is thir years old. She is younger than Mary and older than Peter. Alice is ...
【多选题】中国古典园林发展到春秋战国时期,其特点有( )。
A.
出现了以宫室建筑为主的宫苑
B.
园林中已经有了成组的风景
C.
自然山水园林已经萌芽、园林的组成要素都已具备
D.
已经在园林中构亭架桥，种植花木
【简答题】Mary has blended the ingredients.
【单选题】'The volleyball must belong to Mary' means_________
A.
The volleyball must be Mary
B.
Mary has a volleyball
C.
The volleyball must be Mary's
D.
That can't be Mary's volleyball
【单选题】Mary's uncle sent her chickens because ______ .
A.
it was Mary's birthday
B.
Mary's uncle has a good harvest
C.
chickens can lay eggs.
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