皮皮学，免费搜题
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【单选题】
药物的灭活和消除速度决定药物作用的:A.
起效快慢
B.
强度与维持时间
C.
不良反应的大小
D.
后遗效应大小
E.
直接作用或间接作用
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】—Where________? —He has left a (n) ________ saying that he has something important to do. [ ]
A.
has Tom gone; message
B.
has Tom been; note
C.
will Tom go; word
D.
did Tom go; excuse
【单选题】Why didn't he go to see the doctor immediately?
A.
He has no time during weekdays.
B.
He has no time during weekends.
C.
The symptoms disappear on weekends.
D.
Both A and
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