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【多选题】
吗啡治疗心源性哮喘是由于 （ ）A.
扩张外周血管，降低外周阻力，减轻心脏负荷
B.
扩张支气管平滑肌，保持呼吸通畅
C.
镇静作用有利于消除焦虑及恐惧情绪
D.
降低呼吸中枢对CO 2 的敏感性，改善急促浅表的呼吸
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【单选题】Local bus can reduce the occupation time of CPU. For the EISA local bus, commonly the time can be reduced to ( ).
A.
46％.
B.
265
C.
12％.
D.
6％.
【单选题】Local bus can reduce the occupation time of CPU.For the PCI local bus, commonly the time can be reduced to
A.
46%.
B.
26%.
C.
16%.
D.
6%.
【简答题】New policies, _______ to insure that compulsory education is truly free, _______by the local gov22. New policies, _______ to insure that compulsory education is truly free, _______by the local governm...
【单选题】It is the first time that the local education authority ________ such strict requirements on going-to-school time for primary and middle school students. [ ]
A.
makes
B.
has made
C.
had made
D.
made
【单选题】—Miss Lin ,could you tell me _________about the local education ? ---I think WWW. fzedu. gov. CNN will be helpful .
A.
how can I find information
B.
what information can I get
C.
Where I can get the news
【单选题】Recycling has become the first choice for the disposal of rubbish because_____.
A.
local governments find it easy to manage
B.
recycling has great appeal for the jobless
C.
recycling causes little pollution
D.
other methods are more expensive
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