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【单选题】
一般注射剂的pH值要求为:A.
3~5
B.
7.35～7.45
C.
4～9
D.
7~8
E.
8～10
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举一反三
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A.
mention signal stations and ice, storm, traffic and port signals
B.
give the international numbers of lights
C.
give the correction of the lights and fog signals
D.
give the information on the lights and fog signals
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A.
base
B.
result
C.
cause
D.
force
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will have reserved
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reserve
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