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【单选题】
男孩,6岁。2年前患原发性肾病综合征经药物治疗病情稳定,症状好转。近半年内复发,医生建议应用细胞毒药物治疗。肾病综合征最常用的细胞毒药物是A.
甲氨蝶呤
B.
苯丁酸氮芥
C.
6-巯基嘌呤
D.
三尖杉酯碱
E.
环磷酰胺
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皮皮学刷刷变学霸
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【简答题】核酸完全的水解产物是____、戊糖和____。其中____又可分为____碱和(嘧啶)碱。
【单选题】_____ apples and milk on sale in this Downtown Supermarket.
A.
There are
B.
There aren't
C.
There isn't
【简答题】核酸完全的水解产物是磷酸、戊糖和_______(其又可分为______和_____两类)。
【单选题】_____apples and milk on sale in this shop
A.
3
B.
There are
C.
There is
D.
There isn't
【判断题】We consider it necessary tha t the paper should be examined twice before handing it in.
A.
正确
B.
错误
【简答题】____ some apples and milk on sale
in this supermarket.A. There are B. There is C. There isn’t D. There aren’t
【单选题】Cui Jianping who gave his life to save a girl in America ten years ago was _____ honour to our school. A memorial is held here every year in _____ honour of him. [ ]
A.
an; the
B.
an; /
C.
the; the
D.
/; /
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