阅读理解
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
WASHINGTON - Considering the serious warnings lately about Internet viruses (病毒), users may be tempted (＝make sb. want to do sth. that especially is wrong) to unplug their machines just to keep them safe. In reality, common sense and a few basic tips can keep Internet surfers secure (＝safe).
Antivirus software is a must, and it should be updated (＝make sth. more modern or add new things to it) at least once a week to recognize newly released (释放的) viruses.
People with broadband Internet connections should also have a firewall. These protect the computer from attacks by hackers (黑客).
Then it is time to think about computer habits. Unlike old viruses, which spread only through shared diskettes (软盘), the Internet brings viruses straight to the e-mail box. If an e-mail with attachment comes from an unknown sender, or unexpectedly from a known sender, it should not be opened.
On receipt (回执) of an unexpected attachment from a friend, experts suggest a telephone call to make sure of the mail's source before opening.
1．Why should antivirus software be updated at least once a week?
[ ]
A．Because the newly published antivirus software is more expensive.
B．Because the previous (先前的) antivirus software cannot work any longer.
C．Because the inventors of viruses have suggested this idea.
D．Because computer viruses are always developing.
2．Which of the following is suggested by computer experts?
[ ]
A．Don't rush to open any e-mail attachment.
B．Never open any e-mail attachment.
C．It's always safe to open an e-mail attachment from a friend.
D．Whenever you receive an e-mail, you should make a call to make sure whom it comes from.
3．Which of the following is NOT right according to the passage?
[ ]
A．Something can be done to keep our computers safe.
B．Even an e-mail attachment coming from a friend may not be safe to open.
C．We should unplug our computers to defend ourselves from viruses.
D．Antivirus software made in some yeas ago is hard to protect today's computers.
科目：高中英语 来源： 题型：053
阅读理解
In the 1940s, Pinehaven Park was one of Crafton City's loveliest recreation(娱乐)areas. Over 40 acres of woods and fields were open to the public. In the 1950s, part of the park was taken over by Crafton City's garbage. Fifteen acres were to be used for landfill disposal(理置). As time went on, more and more of the park was used for garage disposal and less for recreation. Two years ago, the park was closed to the public for good. Along with household garbage, industrial chemicals had for years been dumped (倾倒)in the Pinehaven landfill. These poisonous chemicals had begun to seep(渗)back up through the soil. All of Pinehaven Park had become dangerously polluted.
Last year, the fish in the Crafton River began to die. After a series of investigations(研究), it became clear that the people of Crafton City were not to blame. 100～150 miles upstream, big paper mills were dumping industrial wastes into the river. Little by little, the level of poison in the river began to rise. Finally, it became so polluted that the fish themselves could no longer survive.
Downtown Crafton used to be a quiet area. Ten years of remarkable growth changed that in a big hurry. But with Crafton City's new prosperity(繁荣)came a new problem: air pollution. And it is a serious problem. Air pollution levels in Crafton are regularly reaching those of the nation's large industrial cities.
(1)Which of the following best states the central idea of the passage?
[ ]
A．Chemical dumping is a serious threat to Crafton City's soil.
B．The rapid growth of industry has brought air pollution to Crafton City.
C．The disposal of garbage can destroy recreation areas.
D．Industrial growth and progress have resulted in the pollution of Crafton City's water, air, and soil.
(2)According to the passage, what portion of the park had originally been marked for use as a garbage dump?
[ ]
A．Less than half B．Exactly half
C．About one third D．Most of it
(3)As it is used in the passage, the phrase“for good”means ________.
[ ]
A．practically B．for ever
C．thoroughly D．advantageously
(4)According to the passage, one result of dumping industrial chemicals into the landfill was that ________.
[ ]
A．the land became unsafe for humans
B．the animals on the land died
C．the poisonous chemicals were washed into the nearby river
D．the smoke from the chemicals polluted the air surrounding the landfill
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科目：高中英语 来源：四川省绵阳中学2009－2010学年高一下学期入学考试英语试题 题型：050
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