Drivers who listen to music on         road are more likely to have          accidents, a science magazine said recently.

A．the ; 不填

B．a ; the

C．不填; 不填

D．不填;the

鉴定矿物类中药的透明度时，应将矿物磨成的标准厚度是

A．0.03cm

B．0.03cm

C．0.03nm

D．0.03A