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【单选题】
下列属于HCFC类制冷剂的是( )。
A.
R133
B.
R143
C.
R153
D.
R163
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【单选题】经络学说中的“血海”指的是
A.
足阳明经
B.
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C.
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D.
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A.
足阳明胃经
B.
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C.
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D.
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E.
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A.
足阳明胃经
B.
督脉
C.
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D.
冲脉
E.
足太阴脾经
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A.
足阳明胃经
B.
督脉
C.
足少阳胆经
D.
冲脉
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