The Sex Discrimination Act has not___________________discrimination in employment.
A. detroyed
B. defeated
C. killed
D. eliminated
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美国军队作好了发动大规模海、陆、空攻击的准备。
A. poised
B. posed
C. imposed
D. pointed
Many forms of cancer can be cured if ___________________ early.
A. detect
B. detects
C. detected
D. detecting
Her husband mountsthe work on velour paper and makes the frame. 这句中的mount是什么意思？
A. If youmounta campaign or event, you organize it and make it take place.
B. If somethingmounts, it increases in intensity.
C. If somethingmounts, it increases in quantity.
D. If youmountan objectonsomething, you fix it there firmly.
以下关于HDLC的帧结构的描述中,错误的是
A. HDLC帧由标志、地址、控制、信息、帧校验与标志等字段组成
B. 数据链路层的“帧”相当于OSI中的DL-PDU
C.HDLC帧在信息字段中采用“0比特插人/删除方法”
D. 网络层提交给的数据放在HDLC帧信息字段中
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