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【单选题】
支气管扩张的发生最主要由于A.
细菌感染
B.
支气管腔被炎症渗出物堵塞
C.
支气管近端管腔狭窄
D.
结构因炎症而遭到破坏
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【简答题】图甲中寒署表的示数为 ℃；图乙中弹货测力计的示数为 N．
【单选题】Becasuse of a long drought, the farmer was ______ about the prospect of a good yield.
A.
alarmed
B.
uncertain
C.
unlikely
D.
suspended
【单选题】If the Europeans thought a drought—a long period of dry weather—was something that happened only in Africa, they know better now. After four years of below-normal rainfall (in some cases only 10 perce...
A.
They know more about the causes of the drought.
B.
They have a better understanding of the drought in Africa.
C.
They have realized that the drought in Europe is the most serious one.
D.
They have realized that droughts hit not only Africa but also Europe.
【单选题】The long drought was followed by months of____.
A.
famine
B.
tame
C.
fancy
D.
fatigue
【单选题】But sometimes , no rain falls for a long , long time. Then there is a dry period , or drought .
A.
旱灾
B.
天灾
C.
水灾
【简答题】已知n是自然数，而n 2 -19n+91的值是完全平方数，求n．
【单选题】But sometimes, no rain falls for a long, long time. Then there is a dry period, or drought .
A.
洪涝
B.
干旱
C.
枯萎
D.
丰收
【简答题】甲数是m，比乙数的3倍多n．表示乙数的式子是______．
【简答题】求满足1+3+5+…+n＞500的最小自然数n.
【单选题】The long absence of rain _______ leads to a serious drought in the southwest of China, which draws the concerns of the whole country.
A.
immediately
B.
accidentally
C.
gradually
D.
undoubtedly
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