从目前应用需求来看,下面 ______ 不是全球多媒体网络必须具备的特性。
A. 异构性
B. 安全性
C. 移动性
D. 交互性
查看答案
Aw指的是( )
A. 膳食营养供给量
B. 营养生理需要量
C. 营养质量指数
D. 食品水份活性
E. 人体每日容许摄入量
My suggestion yesterday was that a meeting______to discuss the matter.
A. should
B. must be held
C. would be held
D. be held
一般的酶促反应速度较快的温度是( )
A. 温度100℃时
B. 温度0℃以下时
C. 温度60℃
D. 温度30~40℃时
E. 温度0~100C时
There was so much noise that the speaker couldn't make herself ______.
A. heard
B. to hear
C. hearing
D. being heard