题目内容

____ allows people to compose, send, and receive messages quickly and conveniently at any time rather than going to the post office and mailing a letter.

A website
B. Email
C. Web browser
D. A chat room

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Before you _______, you need to check the system requirements to make sure it is compatible with your system.

A. check your email
B. surf the Internet
C. write an email
D. install new software

More and more companies are ______ about their products and services as a way to promote more business online.

A. building websites
B. downloading files
C. scanning for viruses
D. sending files

A computer's _______ is called its heart or "brains" because it's where data is processed.

A. RAM
B. USB
CPU
D. WIFI

（）的《至小丘西小石潭记》以优美的语言描写了“小石潭”的景色，含蓄地抒发了被贬后无法排遣的忧伤凄苦的感情。

A. 韩愈
B. 柳永
C. 苏轼
D. 柳宗元