公共安全管理中规定，所有公共作业均应设置（）警示标识。
A、小心地滑
B、正在施工
C、作业防护
D、禁止入内
参考答案：B
The 18 college students in Fudan University should show their greatest respect to their hero — Zhang Ninghai instead of being cold and unfeeling.
A．absolutely
B．slightly
C．fluently
D．painfully
关于点滴状副银屑病下列正确的是（）
A.自觉剧烈瘙痒
B.常于幼儿发病
C.起病急、发展快
D.皮疹为淡红色斑疹、斑丘疹、表面薄鳞屑
E.影响健康
