下列抗高血压药物中，不属于β受体阻断药的是
A．拉贝洛尔B．美托洛尔C．噻吗洛尔D．纳多洛尔E．普萘洛尔
参考答案：A
—Tom, _______ your T-shirt right now! It looks so dirty.
—Sorry, Mum. I was playing football the whole afternoon. [ ]
A. take off
B. take on
C. put off
D. put on
简述体育服务成为商品的条件
