在碱性尿中抗菌作用增强的药物是：

A．氯霉素

B．四环素

C．庆大霉素

D．阿莫西林

E．磺胺嘧啶

A study shows that students living in non-smoking dormitories are not likely to        the habit of smoking.

A．pick up

B．turn up

C．draw up

D．make up