关于抗绿脓杆菌的广谱类青霉素类药物，下列叙述正确的为A．氨苄西林对绿脓杆菌感染有效

商店卖出两件衣服，每件都卖得360元，其中一件赚20%，另一件亏20%，这个商店卖出这两件衣服是赚了还是亏了？请用计算结果加以说明。

知母的功效为

A．清热泻火，止呕除烦
B．清热生津，消肿排脓
C．泻火除烦，滋阴养血
D．清热泻火，滋阴润燥
E．清热泻火，凉血解毒

Each of the following is a valid conclusion that can be drawn from the information in the graph EXCEPT

A．the total revenue from tuition and government funding in 2000 was $120 million

B．between 1980 and 1990, the proportion of total revenue from overnment funding increased

C．revenue from government funding increased every year from 1950 to 2000

D．revenue from tuition increased every year from 1960 to 1990

E．revenue from tuition increased at a greater rate than revenue from government funding

相切于截面的应力称为（）。

A、正应力

B、剪应力

C、拉应力

D、压应力