病毒性肺炎目前以下列哪种发病率最高A．腺病毒肺炎 B．呼吸道合胞病毒肺炎 C．巨细胞

角巩膜缘

Some friends tried to settle the quarrel between Mr and Mrs Smith without hurting the feeling of _______, but failed.

A．none

B．either

C．all

D．neither

—How long are you staying?

—I'm staying ______ a month.[ ]

A. for          

B. at            

C. in          

D. during

朱砂(辰砂)

远动信息的问答式传输模式可以采用单工通信工作方式。