Which one is NOT the reason that some people think it convenient to shop online()
A. They can stay home to buy things
B. They can buy things at any time they like
C. They think they can get lower prices on the Internet
D. They can find free things they want
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It is important that we__ the task ahead of time()
A. will fish
B. finished
C. finish
D. should finish
__ in the company for three years, Mark has business negotiations()
A. Having worked
B. Having been working
C. Have worked
D. Worked
Web前端开发技术中HTML是用来完成网页内容的,CSS是用来设置样式的()
A. 正确 B:错误
后端部分是对普通用户不可见的,例如从数据库中读取数据()
A. 正确 B:错误