中国籍出境人员重点检测( )和监测传染病。
A．遗传传染病 B．检疫传染病C．家庭传染病 D．近亲传染病
参考答案：B
My family is awarm one and a big one as well. There are countless topicsamong the family
members and we often____. [ ]
A. burst into laughter
B.burst out laughter
C. burst in laughter
D.burst off laughter
阐述疟疾发作的机理。
