结核病主要是通过下列哪条途径传播（）
A、蚊虫叮咬
B、咳嗽、打喷嚏
C、与病人一起吃饭
D、与病人一起游泳等
参考答案：B
First impressions are the most lasting. After all, you never get _______ second chance to make
_______ first impression. [ ]
A. a; the
B. the; the
C. a; a
D. the; a
一次正常妊娠失铁
A．500mg
B．600mg
C．700mg
D．800mg
E．900mg
