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【单选题】
关于平喘药的作用机制。稳定肥大细胞膜的药物是（）A.
氨茶碱
B.
沙丁胺醇
C.
托溴铵
D.
倍氯米松
E.
色甘酸钠
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反馈参考答案：
举一反三
【单选题】( )yesterday, I would have asked him not to do that.
A.
Provided he came
B.
if he came
C.
If he had come
D.
Has he came
【单选题】9个月男婴，近期因肺炎用多种抗生素治疗，3天来腹泻，每天7～8次，大便含泡沫多，有豆腐渣样细块。查体：眼窝、前囟略凹，口腔黏膜有白色凝乳状物，心肺腹未见异常。本病最主要的诱因是（）
A.
侵袭性大肠埃希菌感染
B.
轮状病毒感染
C.
产毒性大肠埃希菌感染
D.
应用抗生素致肠道菌群失调，继发真菌感染
E.
小婴儿肠道正常菌群未建立
【单选题】菌群失调性腹泻常见的病因是
A.
细菌、真菌、病毒、寄生虫感染
B.
直肠或结肠溃疡、肿瘤或炎症
C.
肠道正常细菌的数量或比例失去平衡
D.
外界的各种刺激,如受寒、过食辛辣食物等
E.
消化不良,吸收不良或暴饮暴食而起
【单选题】I asked the teacher if there an English test the next day.
A.
would be
B.
will be
C.
will have
D.
would have
【简答题】酶催化反应的机理是 。
【简答题】I have been asked on occasion whether I would like to live my life over again. On the whole it has been a pretty good life, perhaps better than most peoples, but I should see no point in repeating it....
【简答题】I would have brought you the CD you asked for ____________ (如果我没有忘记的话).
【单选题】Had it not been for the fact that I _____ absent, I would have asked you to do this right now.A．
A.
30. Had it not been for the fact that I _____ absent, I would have asked you to do this right now. A．had been
B.
were
C.
should be
D.
Was
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