___young people see and hear in the media helps them to figure out how the world works.

A．Which

B．That

C．What

D．How

临床上不把保泰松作为抗风湿首选药，是因为()

A．保泰松抗风湿作用较弱

B．保泰松造价昂贵

C．保秦松的蛋白结合率太低

D．保泰松的不良反应多且严重

E．以上说法均不对