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【单选题】
下列对下行电流描述正确的是A.
加速静脉血由下肢和系向心回流
B.
加速动脉血流入肺和上肢
C.
升高肌张力
D.
升高血压
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A.
According to the article, one reason for the discovery of new diseases is ____.
B.
According to the article, one reason for the discovery of new diseases is ____.
C.
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A.
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B.
错误
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A.
have increased
B.
are increasing
C.
was increased
D.
has been increased
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