单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A. Sell medical facilities.
B. Further personal contacts.
C. Establish personal contacts.
D. Investigate personal contacts.
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单项选择题
A. The degree they disrupt the computer.B. The way they reproduce and spread.C. The space they occupy on the Internet.D. The target they mainly attack.

A. The degree they disrupt the computer.
B. The way they reproduce and spread.
C. The space they occupy on the Internet.
D. The target they mainly attack.
单项选择题
64（）

A. society
B. public
C. coverage
D. audience
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