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【单选题】
男性，30岁。傍晚时易出现复视，四肢乏力和酸痛，难以支持整白天工作。休息和晨起时有好转。检查：双眼睑轻下垂，左眼外展差：右眼下视差，双眼球其余各向活动正常。四肢肌力Ⅳ级，肌张力正常，无其他异常神经损害体征。正常肌电图，但尺神经处重复电刺激后，支配肌的动作电位波幅递减25%。可能帮助诊断的血液化验为（）A.
肌酸激酶（CK）
B.
血钾
C.
血癌胚抗原
D.
乙酰胆碱受体抗体
E.
抗肌萎缩蛋白（dystrophin）
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皮皮学刷刷变学霸
举一反三
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A.
one
B.
other
C.
it
D.
that
【单选题】单项选择（每题1分） We’ve been looking at houses but haven’t found _____ we like yet.
A.
it
B.
them
C.
that
D.
one
【单选题】We’ve been looking at houses but haven’t found ______ we like yet.
A.
them
B.
ones
C.
it
D.
one
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A.
one
B.
ones
C.
it
D.
them
【单选题】(2013·高考辽宁卷)—What do you think of the house? —________It’s everything we’ve been looking for.
A.
Perfect!
B.
Good idea!
C.
Not bad.
D.
SoSo.
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【单选题】We’ve been looking at houses but haven’t found ______ we like yet.
A.
them
B.
ones
C.
it
D.
one