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【多选题】
(2018112)硝酸酯类抗心绞痛药使用过程中可发生耐药现象。关于预防和减少其耐药性的方法,正确的有A.
采用小剂量、间断静脉滴注硝酸甘油，每日保持8——12h的低血药浓度期或无药期
B.
采现偏心给药方式，口服硝酸酯应有一段时间的无硝酸酯浓度期或低硝酸酯浓度期
C.
联合使用巯基供体类药，如卡托普利，可能改善硝酸酯类耐药
D.
联合使用β受体阻断剂、他汀类药物对预防耐药现象可能有益
E.
口服用药易发生耐药性，可改用无首过效应和不易发生耐药的透皮贴剂
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【单选题】We ____ see air but we ____ breathe it.
A.
can't, can
B.
shouldn't, must
C.
daren't, can
D.
mustn't, must
【简答题】Three things are necessary for us to keep alive. What are they? They are air, water and food. We eat food twice 46 three times a day. We drink water several times a day. We breathe air day and 47 . If...
【单选题】There _____ many kinds of birds around here, but now we seldom see them because of the air pollution. [ ]
A.
had
B.
used to have
C.
used to be
D.
are
【单选题】There _____ many kinds of birds around here, but now we seldom see them because of the air pollution. [ ]
A.
use to
B.
use to have
C.
use to be
D.
are
【单选题】—Look, there _____ many birds around here, but now we seldom see them. What a pity! —Yeah! The air pollution has caused the problem! [ ]
A.
are
B.
used to have
C.
used to be
D.
use to have
【单选题】There _____ many kinds of birds around here, but now we seldom see them because of the air pollution. [ ]
A.
use to
B.
use to have
C.
used to be
D.
are
【单选题】—Look, there_____ many birds around here, but now we hardly see them. What a pity! —Yeah! The air pollution has caused the problem!
A.
are
B.
used to have
C.
used to be
D.
use to be
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