鼠疫杆菌能在蚤体内大量繁殖的部位是
A．前胃几丁质刺间
B．体腔内
C．唾腺内
D．胃上皮细胞表面
E．胃上皮细胞内
参考答案：A
The fact that so many people still smoke in public places ________ that we may need a nationwide
campaign to raise awareness of the risks of smoking.[ ]
A. suggest
B. suggests
C. suggested
D. suggesting
青少年伤害一级预防的关键措施包括（）
A.法律对策
B.安全教育
C.伤害监测
D.社区康复
E.主动和被动干预
