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【单选题】
激惹性腹泻的常见主要病因是A.
外界的各种刺激，如受寒、过食辛辣食物等
B.
肠道正常菌群的数量或比例失去平衡
C.
细菌、真菌、病毒、寄生虫感染
D.
直肠或结肠溃疡、肿瘤或炎症
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举一反三
【单选题】The glass of water is too hot. I prefer some cold _____ water.
A.
to boil
B.
having boiled
C.
boiled
D.
boiling
【简答题】球坐标机器人的手臂运动由两个 和一个 组成。
【单选题】---What about going hiking this afternoon, Simon? --- I prefer ______ to _________ , it is too hot.
A.
going hiking, stay at home
B.
to stay at home, hike
C.
to hike, stay at home
D.
staying at home, going hiking
【单选题】—What about playing football this afternoon ? --I prefer ________at home to ______out .It’s too hot outside .
A.
stay ;go
B.
to stay ;go
C.
staying ;go
D.
staying ;going
【判断题】笼型和绕线型异步电动机只是转子的结构不同,前者转子为笼型绕组,后者转子为三相绕相,且每相绕组的首端与转轴上的三个滑环相连接。从外观结构上看,具有三个滑环的必为绕线型,否则即为笼型。
A.
正确
B.
错误
【单选题】The water in this glass is too hot. I prefer some cold______ water.
A.
to boil
B.
having boiled
C.
boiling
D.
boiled
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