题目内容
A．He is tall and thin.B．He is crossing the street.C．He is Prof. Green, our new computer
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Section A
Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.
(1)
Section B
Directions: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. The dialogues and questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.
(6)
关于即时通信系统的描述巾，正确的是
以下不属于身份认证协议的是
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