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【单选题】
一名59岁的轻度充血性心力衰竭患者采用呋塞米进行治疗,请问该药物的主要作用机制是A.
.抑制Na＋－K＋－ATP酶
B.
.抑制Na＋，K＋－2Cl－同向转运体
C.
抑制Na＋－Cl－同向转运体
D.
.抑制Cl－转运子
E.
抑制Ca2＋转运
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A.
html决定页面的行为，css决定页面的样式，js决定页面的结构
B.
html决定页面的样式，css决定页面的结构，js决定页面的行为
C.
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D.
以上都不正确
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【单选题】What must have happened to the writer in the end?
A.
He must have spent a long time at the customs and must have been let go without any punishment.
B.
He must have been given a fine as a punishment.
C.
His Rolex must have been confiscated. '
D.
His cheap watch must have been confiscated.
【单选题】关于WEB标准下列说法正确的是
A.
html相当于人的动作行为，CSS相当于人的穿着打扮，javascript相当于人的骨架结构
B.
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C.
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D.
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【单选题】He looks tired, he()too little sleep.
A.
must have
B.
must have had
C.
must have been
相关题目：
【简答题】A．must have been provided B．might have provided C．must have provided D．might have been provided