The reason why the mice in Ader’s experiment avoided saccharin was that ________.
A. they disliked its taste
B. it affected their immune systems
C. it led to stomach pains
D. they associated it with stomachaches
In Shanghai, of 150 elderly women, only ________ have husbands still living.
[A] 75
[B] 52
[C] 82
[D] 78
采取的动作是
A. 纠正该IP数据报的错误
B. 将该IP数据报返给源主机
C. 抛弃该IP数据报
D. 通知目的主机数据报出错
A．I concern B．dealC．work D．do
A. I concern
B. deal
C. work
D. do
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