冠状动脉粥样硬化性心脏病危险因素有()
A．吸烟
B．肥胖
C．糖尿病
D．B型性格
E．高血压
参考答案：A,B,C,E
The teacher asked Jim _______________.
A．why was he late for school
B．why he was late for school
C．how he was late for school
D．how was he late for school
感染的含义是（）
A．病原体侵入人体的结果
B．亦称传染，是病原体对人体的一种寄生的过程
C．病原体、人体及环境因素的综合
D．病原体借助于传播媒介作用于人体
E．宿主与病原体发生的特异性免疫反应
