肾实质手术后应注意()膀胱肿电切术后应注意()
A．绝对卧床休息
B．注意尿颜色的变化
C．两者均是
D．两者均非
参考答案：C,B
发病率、患病率和病程三者的正确关系为（）
A、患病率＝发病率×病程
B、患病率＝发病率÷病程
C、患病率＝发病率+病程
D、病程＝患病率-发病率
E、发病率＝患病率×病程
When a fire ______ at the National Exhibition in London, at least ten priceless paintings were completely destroyed.
A．broke off
B．broke out
C．broke down
D．broke up
