42.A.safety B.safe C.dangerous D.danger 查看更多

 

题目列表(包括答案和解析)

It's not ________ to ride across the road when the traffic lights is red.

[  ]

A.

dangerous

B.

safe

C.

safety

D.

danger

查看答案和解析>>

It’s ____ to play on the road. You’d better play in a ____ place.

A.safe, dangerous                        B.safety, danger

C.safe, danger                           D.dangerous, safe

 

查看答案和解析>>

It’s ____ to play on the road. You’d better play in a ____ place.

A.safe, dangerous

B.safety, danger

C.safe, danger

D.dangerous, safe

 

查看答案和解析>>

阅读理解

  First it was an earthquake.Then came a terrible tsunami.These natural disasters killed thousands of people in Japan on Mar.11, 2011.Then a nuclear crisis(核危机)put the island in danger and shocked the world.

  Damaged by the earthquake and tsunami, Fukushima Daiichi nuclear plant(福岛第一核电站)has put out dangerous radioactive(放射性的)materials.Experts from several countries are working to control the crisis.

  Although the reports say the leak so far will not cause huge health problems, people are worrying about nuclear safety.Switzerland has stopped plans to build new nuclear plants.Germany raised questions about its nuclear future.

  As for China, the government has suspended approving(暂停审批)new nuclear power stations and stepped up safety checks at existing plants, Xinhua reported.But it is reported that all nuclear power stations in China are safe.

  A nuclear power plant creates electricity.It is a clean energy source.In 1954, the world's first nuclear power plant was built in Russia.From then on, nuclear power has been widely used.

  But nuclear power plants have hidden problems.If radioactive materials get into the air or water, they can pollute soil and plants and harm humans and animals.Nuclear accidents, such as the Chernobyl(切尔诺贝利)disaster in 1986 in the Ukraine, have caused great damage to the nearby people and the environment.

  Will there be another choice for energy that we can use in the future? In recent years, scientists have found ways to make electricity from sunshine, wind and garbage.

  Some scientists say hydrogen(氢气)may be used to create power.Hydrogen is a clean resource to use, and will never disappear.Some car companies have already developed cars powered by hydrogen.But still, the technology for its production is only in early stages of development.

(1)

Which is the correct order of the following statements?

a.the leak of radioactive materials

b.a tsunami

c.an earthquake

d.a nuclear crisis

[  ]

A.

b-c-d-a

B.

c-b-a-d

C.

b-d-c-a

D.

c-a-b-d

(2)

The first nuclear power plant has been in use for ________ years.

[  ]

A.

35

B.

57

C.

53

D.

56

(3)

The underlined word “ they” in the six paragraph means ________.

[  ]

A.

hidden problems

B.

nuclear accidents

C.

radioactive materials

D.

Japanese

(4)

We can infer that ________.

[  ]

A.

Nuclear has huge power but it is harmless to people.

B.

People are not afraid of nuclear safety because experts have confirmed the leak so far will not cause huge health problems

C.

As a new clean power, Hydrogen will be in used very soon.

D.

China will not build new nuclear power plants in the next few years.

(5)

What is the main idea of the passage?

[  ]

A.

Another choice for energy in the future.

B.

A terrible earthquake in Japan.

C.

Hydrogen will surely take the place of nuclear power very soon.

D.

A clean energy source-nuclear power

查看答案和解析>>

Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possibleproblems with social networking sites and the teenagers who use them.

Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicatewith others who share the same interests and to get helpful advice on ongoing projects.
Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.
A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It’s easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.
Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.
Therefore, it’s very important to make sure teens are safe when they use social networks.
Many of the same rules that work for online chat work for these sites:
※Don’t use your real name.
※ Don’t give out personal information to people you don’t know. A last name and a town
are enough for a bad guy to find where you are.
※ Don’t believe that people are who they say to be.
※ Immediately end any communication that makes you uncomfortable and report it to a
parent.
Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn’t mean you are unable to do anything but wiser than many others.                                             
【小题1】How many dangers of using social networks are mentioned in the passage?
A.2.B.3.C.4.D.5.
【小题2】The writer takes MySpace as an example to show that ________.
A.students could be put into unreal situations on the Internet
B.teenagers are facing unknown dangers on the social networks
C.Internet provides more social websites to American teenagers
D.social networks are very popular among teenagers in America
【小题3】We can infer from the passage that ________.
A.the dangers are similar when chatting online and surfing social networks
B.more than half American teenagers aged from 12 to 17 use social networks
C.teens who ask for help are wiser when meeting problems on social networks
D.there are more disadvantages than advantages for teens to use social networks

查看答案和解析>>


同步练习册答案