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【单选题】
小鸡是由鸡蛋中的哪一部分发育而成的（）A.
卵白
B.
卵壳
C.
胚盘
D.
卵壳膜
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反馈参考答案：
举一反三
【多选题】下列哪项符合退学要求?( )
A.
经医院确诊，患有精神病、癫痫、麻风病等疾病或意外伤残不能坚持正常学习者
B.
未经请假逾期两周不注册者
C.
本人要求退学，经劝说无效者
D.
学期内考试一门不合格，经补考合格后
【单选题】He was so pleased with all ______ we had done for him _____ he wrote us a letter to praise us for it.
A.
what; what
B.
what; that
C.
that; what
D.
that; that
【单选题】He was so pleased with all _____ we had done for him _____ he wrote us a letter to praise for it. [ ]
A.
that, that
B.
what, that
C.
that, which
D.
which, what
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