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【单选题】
支气管扩张的主要病因是A.
支气管-肺组织感染和支气管阻塞
B.
先天发育障碍
C.
遗传因素
D.
机体免疫功能失调
E.
全身疾病
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【单选题】Months ago we sailed ten thousand miles across this open sea， which ____ the Pacific， and we met n
A.
1.Months ago we sailed ten thousand miles across this open sea， which ____ the Pacific， and we met no storms.、 A．was called
B.
is called
C.
had been called
D.
has been called
【简答题】1 μ F=___ nF;3 μ F = pF 。
【简答题】In open drainage method,according to water amount gushing in foundation pit (groove) bottom, shape of base and pumping ability of pump, determine section ________ of drainage ditch and _________ of co...
【简答题】1F= mF= μ F= nF= pF
【简答题】1F=( )μF=( )nF=( )pF。
【单选题】What can be done in order to make sure that no one in the world goes hungry?
A.
What can be done/ in order to make sure / that no one in the world goes hungry?
B.
What can be done / in order to/ make sure that/ no one in the world goes hungry?
C.
What /can be done / in order to/ make sure that/ no one in the world goes hungry?
D.
What can be done/ in order to make sure that /no one in the world goes hungry?
【单选题】_____ we were once met with doubt, now we're met with open arms.
A.
when
B.
what
C.
where
D.
how
【简答题】电容器常用单位有 法(mF)、 法(μF)、 法(nF)和 法(pF)。1F= mF , 1F= μF ,1F= nF,1F= pF。
【单选题】Months ago we sailed ten thousand miles across this open sea，which the Pacific，and we met no storm．
A.
was called
B.
is called
C.
had been called
D.
has been called
【简答题】下腔静脉的主要属支有______、______、______、______、______、______和______。
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