皮皮学，免费搜题
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搜题
【单选题】
社会主义道德建设的核心是( )A.
为人民服务
B.
集体主义
C.
追求真理
D.
艰苦奋斗
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皮皮学刷刷变学霸
举一反三
【简答题】招聘与甄选的核心是（）。
【单选题】The math problem seems very easy, but in fact it is very difficult_______.
A.
to work out
B.
being worked out
C.
working out
D.
to be worked out.
【单选题】He proved himself a true gentleman and the beauty of his ________ was seen at its best when he worked with others. [ ]
A.
advantage
B.
appearance
C.
qualification
D.
character