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【多选题】
锅炉的构成主要包括：A.
锅炉本体
B.
辅助设备
C.
排污系统
D.
锅炉附件
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反馈参考答案：
举一反三
【单选题】He knows several languages, ______, he knows English and Japanese.
A.
such as
B.
for example
C.
that is
D.
for an example
【单选题】He should ( ) what he's good at, and no switch to something he knows nothing about.
A.
take on
B.
stick to
C.
go after
D.
live on
【单选题】Child as he is, he knows a lot. 同意句是
A.
Although he is a child, he knows a lot.
B.
He knows a lot because he is a child.
C.
When he is a child, he knows a lot.
【单选题】_______, he knows a lot about computer.
A.
As he is a child
B.
Child as is he
C.
Child as he is
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