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【单选题】
慢性支气管炎合并肺气肿时主要的临床表现是A.
突然发作呼吸困难
B.
进行性呼吸困难
C.
心悸
D.
咳粉红色泡沫痰
E.
咯血
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反馈参考答案：
举一反三
【单选题】Living in a big city has many _____, such as good schools, libraries and convenient traffic.
A.
goodness
B.
advantages
C.
effects
D.
uses
【单选题】When many people discuss schools 'good or bad', what are they talking about?
A.
Financial costs.
B.
Locations of schools.
C.
Their personal belief systems.
D.
Information gathered through research.
【单选题】为真空中两个平行的“无限大”均匀带电平面,已知两平面间的电场强度大小为E 0 ,两平面外侧电场强度大小都为E 0 /3,方向如图.则A,B两平面上的电荷面密度分别为
A.
=0 ; =0
B.
=-4ε 0 E 0 /3 ; =2ε 0 E 0 /3
C.
=2ε 0 E 0 /3 ; =2ε 0 E 0 /3
D.
=-2ε 0 E 0 /3 ; =4ε 0 E 0 /3
【单选题】气象灾害预警信号根据气象灾害可能造成的危害程度、紧急程度和发展态势一般划分为四级,其中特别严重的等级用____色表示。(出题单位:中国气象局)
A.
蓝
B.
黄
C.
橙
D.
红
【单选题】Our schools, according to the passage, ______.
A.
are providing proper conditions for good writing
B.
should not stress writing speed on a test
C.
should give essay tests rather than multiple-choice tests
D.
teach good writing primarily through reading
【简答题】( )调唱名法, 又被称作是“移动着的Do”。 大调音阶的首音唱do,小调音阶的首音唱la。
【单选题】Living in the city has many ____ such as good schools, big shopping centers and so on.
A.
advantages
B.
activities
C.
difficulties
D.
communications
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