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【单选题】
What does the protocol field inside the PPP frame indicate？（）A.
the protocol used to determine the authentication method
B.
the protocol used to identify the data in the Information field
C.
the protocol used to carry the PPP frame
D.
the protocol used to decode the FCS field
E.
the protocol used to detect the number of padding bytes
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【单选题】He did in class, so he failed in the final-term test.
A.
well
B.
poor
C.
good
D.
Poorly
【简答题】用C语言实现:输入一串字符,统计其中空格的个数
【简答题】输入一串字符,统计其中数字字符的个数。
【单选题】听力原文：We currently believe that the earths crust-the rocky part of the earth-is composed of several large, rigid plates. These plates are being created at some edges and being destroyed at others. They...
A.
Wilson developed a warning system for earthquakes.
B.
Wilson wrote an article that contradicted scientific law.
C.
Wilson first proposed the theory of plate tectonics.
D.
Wilson discovered sea floor spreading in the North Atlantic.
【单选题】He did in class, so he failed in the final-term test.
A.
well
B.
poor
C.
good
D.
poorly
【简答题】So nervous did Tommy felt that he couldn’t speak in front of the whole class.
【单选题】( )是在支承环与支墩面之间设置可以摆动的短柱,短柱的下端与支墩绞接,上端以圆弧面与支承环的承板接触。
A.
滚动支墩
B.
平面滑动支墩
C.
鞍型滑动支墩
D.
摇摆支墩
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