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【单选题】
引起肺回缩的主要因素是A.
胸内负压
B.
肺弹性组织的回缩力
C.
胸膜腔浆液分子的内聚力
D.
肺泡表面张力
E.
胸廓弹性回位力
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举一反三
【简答题】 冻结退避计时器剩余时间的做法是为了使协议对所有站点更加公平,请进一步解释。
【单选题】— Will you buy ________ stickers ______ me? — Sure. [ ]
A.
some; to
B.
any; to
C.
some; for
D.
any; for
【单选题】--- Will you buy ________ stickers ______ me? --- Sure.
A.
some; for
B.
any; to
C.
some; to
D.
any; for
【单选题】A: --- Are you coming to Jim’s birthday party ? B: --- I’m not sure. I ________ go to the concert instead.
A.
should
B.
would
C.
must
D.
might
【单选题】Some of the students are not sure ___ spelling the word, while others are not sure ___ the use of some grammatical rules.
A.
of… about
B.
about…to
C.
of…to
D.
for….of
【单选题】—Could I have _______ oranges, please? —Sure, here are _______ for you.
A.
any, any
B.
some, some
C.
some, any
D.
any, some
【简答题】二阶齐次线性微分方程的两个解 , 成为其基本解组的充要条件是 。
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