Whoever leaves the lab last, _____ all the lights are turned off.

A．make sure

B．make sure of

C．be sure

D．be sure of

普通型流脑败血症期特征性的表现是（）

A.高热

B.剧烈头痛

C.全身中毒症状

D.皮肤黏膜瘀斑

E.脑膜刺激征阳性