若该患者为脑膜炎患者，则其脑脊液标本不应（）
A.立即送检
B.保温
C.床边接种
D.避免污染
E.冷冻保藏
参考答案：E
Two _____ died of cold in that country last winter.
A．hundreds old people
B．hundreds of old people
C．hundred old people
D．hundred old peoples
完成下面光路图．
