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【单选题】
听诊时的注意事项不包括A.
环境要安静、温暖、避风
B.
避免产生附加音
C.
注意力要集中，排除干扰
D.
体件要紧贴于被检查的部位
E.
听诊时应用膜型听诊器
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【单选题】Gram-negative bacteria differ from gram-positive bacteria because of the fact ( ).
A.
That in Gram-negative bacteria the peptidoglycan cell wall is only 1 or 2 layers thick, whereas in gram-positive bacteria it is many layers thick.
B.
That in gram-negative bacteria basic dyes and detergents are much more harmful than for gram-positive bacteria.
C.
That in gram-negative bacteria lipoprotein—which is not found in gram-negative bacteria—anchors the outer membrane to the capsule.
D.
That in gram-positive bacteria porin proteins are invariably found, and are not found in gram-negative bacteia.
E.
All of the above are ture.
【单选题】The author implies that bacteria were investigated earlier than viruses because
A.
bacteria are easier to detect.
B.
bacteria are harder to eradicate.
C.
viruses are extremely poisonous.
D.
viruses are found only in hot climates.
【简答题】顶级容器JFrame的布局管理器默认为 ,中间容器JPanel的布局管理器默认为 。
【简答题】A．The bacteria would be killed by the human immune system. B．The bacteria would die if brought to the suce. C．Many antidotes and remedies are available. D．Drilling operations are always closely mon...
【简答题】A．Bacteria can help control some pollution problems. B．Bacteria can eat gasoline in the sea. C．Bacteria can excrete (排泄) hydrogen and oxygen. D．He thought bacteria just caused illness.
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