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问题 单项选择题

计算机的防火墙的主要作用是_____。

A．防止计算机引起的火灾

B．阻止计算机病毒

C．保护网络中的数据和资源的安全

D．对网络中信息进行加密

答案

参考答案：C

解析：防火墙是一项协助确保信息安全的设备，会依照特定的规则，允许或是限制传输的数据通过，以达到保护网络中的数据和资源安全的目的。

补全对话，情景问答

口语运用。在下列横线上填入适当的话语（可能是一个句子，短语或单词），使对话完整。

A: Where do you come from, please?

B: (1)                                                          

A: Er…. You come from Chongqing, don't you?

B: Yes, I do. How did you guess?

A: (2)                                                          

B: You are right. My grandparents live there. My parents and I moved here last year.

A: (3)                                                           

B: Because my father found a better job in this city.

A: (4)                                                         

B: He teaches maths in a school.

A: Oh, he is a teacher. Could I ask him to help me with my maths?

B: I'm afraid he can't. He's ill and he's in hospital now.

A: (5)                                                         

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单项选择题 B1型题

阴寒内盛，反见热象的病机是（）

A.阳虚则寒

B.阴损及阳

C.阴盛则寒

D.阴盛格阳

E.阳盛格阴
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