静力作业时肌肉的收缩方式是
A．等长收缩B．等张收缩C．交替收缩D．间断性收缩E．频繁收缩
参考答案：A
—I like drinking wine. But people who drink wine aren't allowed to drive.
—If I _____ you, I would give up _____ wine.[ ]
A. were; drinking
B. am; drinking
C. were; drink
D. was; to drink
男性，18岁，运动员，身体健壮。体检：血压120／80mmHg，心率50次／分，心电图示窦性心动过缓。为初步判断其窦性心动过缓是否为生理性，应让其进行下列哪项动作后再测心率（）
A.深吸气
B.深呼吸
C.Valsalva动作
D.运动
E.安静休息
