D．

When I first got an email account ten years ago, I received communications only from family,friends,and colleagues.Now it seems that every time I check my e-mail ,I have an endless seriers of advertisement and otner correspondence that do not interest the at all.If we want e-mail to continue to be useful,we need special laws that make spamming(发送垃圾邮件) a crime.

This problem is troubling for inviduals and companies as well. Many spam emails contain computer viruses that can shut down the entire network of a company.Companies rely on e-mail on on e-mail for their Comployees to communicate with each other. Spam frequently causes failures in their local commnications networks,and their employees are thus unable to communicate effectively.such a situationg results in a loss of productivity and requires companies to repeatedly repai their networks.These computer problems raise productton costs of companies ,which are,in the end,passed on to the consumer.

60.What is the purpose of the text?

A．To inform.

B．To educate

C．To persuade

D．To instruet

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[单选题]23. When I got there, he _____ them to dance.A． is teaching B. teachesC. was teaching D. taught

[试题]When I got to the station，the bus______ (go)．

[单选题]When I first entered university, my aunt, who is an English professor, gave me s new English dictionary. I was __36___to se that it was an English English dictionary, also known as a monolingual dictionary._37___it was a dictionary intended for non—n

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[单选题]Text 3When the first white men arrived in Samoa, they found blind men, who could see well enough to describe things in detail just by holding their hands over objects. In France, Jules Roman tested hundreds of blind people and found a few who could t

[单选题]When I first arrived in Japan, I was surprised _____ the way people greeted

[单选题]When I first arrived in Japan, I was surprised _____the way people greeted

[单选题]Compared with using the FIFO (first in, first out) method to account for in

[单选题]StopSpamWhen I first got ane-mail account ten years ago,I received communic