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【单选题】
下列药物中 , 第一个上市的 H2- 受体拮抗剂为A.
.Nα-脒基组织胺
B.
咪丁硫脲
C.
甲咪硫脲
D.
西咪替丁
E.
雷尼替丁
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【单选题】We looked forward to the day when the motorcar has been replaced by some less dangerous of transport. [ ]
A.
means
B.
methods
C.
manners
D.
ways
【单选题】We look forward to the day when the car will be replaced by some less dangerous_______ of transport.
A.
methods
B.
means
C.
manners
D.
ways
【单选题】Nowadays when tourists pay a visit to Xi’an, _______ for them to take public transport.
A.
there is very convenient
B.
it is very convenient
C.
there is very conveniently
D.
it is very conveniently
【单选题】When the system upon which a transport entity is running fails and subsequently restarts, the(136)information of all active connections is lost. The affected connections become half-open, as the side ...
A.
data
B.
state
C.
signal
D.
control
【简答题】城市轨道交通车辆尽管形式不同,但均由( ) ,(),(),(),(),(),(),(),(),(),(),(),()等组成。
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