. . ­­—— What’s up ,Mary? ——I’m worried

--- Is there any possible way to help them get rid of such a bad habit?

--- To tell the truth, it’s very hard. But we   on this problem trying to improve the situation.

A．worked

B．had worked

C．are working

D．had been working

患者，男，16岁。高热，惊痫抽搐，痰黄不易咳出，头痛，渐有角弓反张之势，舌红绛，脉数。医生处方中有羚羊角、钩藤、地龙、全蝎。

下列各项，不属地龙主治病证的是（）

A.高热惊痫，癫狂

B.风热外感，头痛

C.气虚血滞，半身不遂

D.小便不利，尿闭不通

E.肺热哮喘

进入呼吸道的粉尘通过各种清除功能，绝大部分均可能排出体外，具体是（）.

A.97%～99%

B.94%～96%

C.91%～93%

D.88%～90%

E.85%～87%

收缩压＜130mmHg，舒张压＜85mmHg

A．理想血压
B．正常血压
C．1级高血压
D．2级高血压
E．3级高血压

1993年发掘的西汉长沙国王后渔阳墓发现一件什么早已失传的乐器而震惊考古学界？