属于一类精神药品的是：
A．强痛定和复方樟脑酊
B．巴比妥和利眠宁
C．氯硝西泮和氟西泮
D．艾司唑仑和三唑仑
E．眠尔通和氨酚待因
参考答案：A
This is________work. It calls for a good eye and a steady hand.
A．precise
B．precision
C．exact
D．exactness
The major problem with E-mail is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day. In addition, mail boxes require some management to (74) messages or archive those that might be required later. Senders don’t always know about your E-mail backlog and often send (75) messages.
A. too B. so C. very D. much
