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B.
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参考答案:
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【单选题】维持胸内负压的必要条件是
A.
胸膜腔密闭
B.
吸气肌收缩
C.
胸内压低于大气压
D.
呼吸道存在一定阻力
E.
呼气肌收缩
【单选题】维持胸内负压的必要条件是
A.
吸气肌收缩
B.
胸膜腔密闭
C.
呼气肌收缩
D.
肺内压低于大气压
E.
肺内压高于大气压
【单选题】Who is responsible for the acceleration of the urbanizing process in many developing countries?
A.
City-dwellers.
B.
Country-dwellers.
C.
Governments.
D.
Environmentalists.
【单选题】维持胸内负压的必要条件是
A.
胸膜腔密闭
B.
吸气肌收缩
C.
胸内压低于大气压
D.
呼吸道存在一定阻力
【单选题】维持胸内负压的必要条件是
A.
吸气肌的收缩
B.
呼气肌的收缩
C.
胸膜腔密闭
D.
肺内压高于大气压
E.
肺内压低于大气压
【单选题】The direction of the acceleration of the block (after leaving the ramp) at position R is best represented by which of the arrows in the diagram?
A.
Arrow 2
B.
Arrow 3
C.
Arrow 5
D.
Arrow 6
E.
None of the arrows, the acceleration is zero.
【单选题】维持胸内负压的必要条件是
A.
吸气肌收缩
B.
呼气肌收缩
C.
胸膜腔密闭
D.
肺内压高于大气压
E.
肺内压低于大气压
【单选题】The direction of the acceleration of the block when in position Q is best represented by which of the arrows in the diagram?
A.
Arrow 1
B.
Arrow 3
C.
Arrow 5
D.
Arrow 7
E.
None of the arrows, the acceleration is zero
【单选题】To the author E-mail is______.
A.
the authority on the acceleration of life pace
B.
the essence of life
C.
both the catalyst and the instrument of the change in human interaction
D.
the living embodiment of human connection in all areas
【多选题】关于子宫形态位置颜色结构描述正确的是( )
A.
子宫大部分位于腹腔内,呈双角状
B.
子宫有子宫角、子宫体和子宫颈构成
C.
组织结构有子宫内膜、子宫肌和外膜构成
D.
子宫呈谈白色
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