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IEEE802．11支持的网络类型是

A. 光纤传感网
B. 无线VPN
C. 无线广域网 I))无线局域网

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在0SI参考模型中，提供路由选择功能的是

A. 物理层
B. 网络层
C. 会话层
D. 应用层

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Which of the following is not a reason for the rapidity and intensity of pollution in Japan？

A. The Japanese were generally modeled on the American Pattern of industrial development.
B. Japan was unwilling to allocate funds for the solution to environmental problems.
C. No sanitary engineering departments were set up in higher institutions in Japan.
D. Japan placed too much emphasis on economic growth and neglected environment.

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Animal welfare groups are apparently most concerned with high school students experimenting with animals in extracurricular projects. Barbara Orlans, President of the Scientists' Center for Animal Welfare, said that students have been performing surgery at random, testing known poisonous substances, and running other pathology experiments on animals without even knowing normal physiology.
At one science fair, a student cut off the leg and tail of a lizard to demonstrate that only the tail can regenerate, she said. In another case, a student bound sparrows, starved them and observed their behavior.
"The amount of abuse has been quite horrifying," Orlans said.
Administrators of major science fairs are short-tempered over the teachers' policy change and the impression it has created. "The teachers were sold a bill of goods by Barbara Orlans," said Thurman Grafton, who heads the rules committee for the International Science and Engineering Fair. "Backyard tabletop surgery is just nonsense. The new policies throw cold water on students' inquisitiveness," he said.
Grafton said he wouldn't deny that there hasn't been animal abuse among projects at the international fair, but he added that judges reject contestants who have unnecessarily injured animals. The judges have a hard time monitoring local and regional fairs that may or may not choose to comply with the international fair's rules that stress proper care of animals, Grafton said.
He said that several years ago, the Westinghouse Science Talent Search banned harmful experiments to animals when sponsors threatened to cancel their support after animal welfare groups lobbied for change.
The teachers adopted the new policies also to fend off proposed legislation—in states including Missouri and New York—that would restrict or prohibit experiments on animals.
Officials of the two teachers' organizations say that they don't know how many animals have been abused in the classroom. On the one hand, many biology teachers are not trained in the proper care of animals, said Wayne Moyer, executive director of the biology teachers' association. On the other, the use of animals in experiments has dropped in recent years because of school budget cuts. The association may set up seminars to teach better animal care to its members.
Notes:
pathology 病理学
lizard 蜥蜴
tabletop 桌面
short-tempered 脾气
lobby for 游说支持
fend off 躲开
The title which best expresses the content of the text is

A. Science Teachers to Ban Testing Harmful to Animals.
B. Teachers' Policy Change in Experiment on Animals.
C. The New Policies of Banning Harmful Experiments to Animals.
D. The Importance of Prohibiting Harmful Experiments on Animals.

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Thurman Grafton suggests that

A. animal abuse is horrible and should be terminated.
B. the teachers have been compelled to do all animal experiments.
C. prohibition of experiments on animals will discourage students from being curious.
D. the international science and Engineering Fair will cease to operate because of the new policies.

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IEEE802．11支持的网络类型是

A. 光纤传感网 B. 无线VPN C. 无线广域网 I))无线局域网

在0SI参考模型中，提供路由选择功能的是

Which of the following is not a reason for the rapidity and intensity of pollution in Japan？

Thurman Grafton suggests that

A. 光纤传感网
B. 无线VPN
C. 无线广域网 I))无线局域网