肺痨发病的基本病因是（）。
A.气虚为主
B.血虚为主
C.血瘀为主
D.阳虚为主
E.阴虚为主
参考答案：E
He expressed his hope ____ he would visit Chinaagain thenext year, and this was
The very hope____he expressed as soon as he arrived in the country.
A．that;that
B．which;which
C．that;which
D．which;that
假设某IT服务企业，其固定成本为30万元，每项服务的变动成本为1000元/次，提供每项服务的价格为1500元/次，那么该企业的盈亏平衡点为（）次。
A.200
B.300
C.600
D.900
