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问题 单项选择题

在电子商务应用中，下面哪一种说法是错误的

A．证书上具有证书授权中心的数字签名

B．证书上列有证书拥有者的基本信息

C．证书上列有证书拥有者的公开密钥

D．证书上列有证书拥有者的秘密密钥

答案

参考答案：D

解析：只含有公开密钥，不含有秘密密钥。

填空题

用所给单词的适当形式填空。

1. On my way home, I found a little girl _______ (cry) in the street.

2. China is _______ (friend) to all the people in the world.

3. These old people often _______ (see) Beijing Opera on weekends.

4. My work is _______ (interest) and exciting.

5. My father _______ (read) evening newspapers every evening.

6. The boss made me _______ (work) for 10 hours a day.

7. I want _______ (take) some books to the classroom.

8. I like going to movies and_______ (play) sports in the open air.

9. Why not _______ (take) a taxi to go there?

10. Xiao Shenyang is a good _______ (act) and we all like him very much.

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单项选择题

加快成倍节拍流水施工的特点是( )。

A．同一施工过程中各施工段的流水节拍相等，不同施工过程的流水节拍为倍数关系

B．同一施工过程中各施工段的流水节拍不尽相等，其值为倍数关系

C．专业工作队数等于施工过程数

D．专业工作队在各施工段之间可能有间歇时间
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