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【单选题】
属于快反应自律细胞的是A.
心房肌,心室肌
B.
纤维
C.
房室交界
D.
结
E.
心房,结区,心室肌
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A.
on one hand…on other hand
B.
on the one hand….on the other hand
C.
on the one hand…on the other
D.
B and C
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A.
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B.
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C.
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D.
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【单选题】Beyond the pale is an idiom _________.
A.
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B.
adjectival in nature
C.
verbal in nature
D.
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