下列哪些疾病适合做大规模的筛检（）
A.艾滋病
B.全民检查HBsAg
C.原位子宫颈癌
D.流行性感冒
E.麻疹
参考答案：C
秘书工作“四个转变”的实质突出了（）。
A.参谋作用
B.管理作用
C.服务作用
D.信息作用
—The earthquake last night was really terrifying.
— , no people were injured or killed, and they escaped in time.
A．Luckily
B．Hopefully
C．Sadly
D．Unfortunately
