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Tony Burke, Australia’s environment minister, says he won’t decide until next year whether the koala should be protected as an endangered species. He was expected to make his decision by the end of October. But that decision has been put off. Burke said he needed more time to go over the latest information about the koala’s population. In September, an Australian Senate committee reported that there was no question the koala’s population is on the decrease. “But they may not yet be eligible (符合条件) for listing as a threatened species,” said Senator Doug Cameron. “To have such a significant Australian icon(偶像) included on the threatened species list would be a national shame.” The koala is found only in the eucalyptus (桉树) forests of Australia. And its population is reported to have fallen sharply for many reasons, including the cutting down of forests to make way for human beings’ development, their own illness, climate change and killings by other animals such as wild dogs. And every year many koalas are hit by cars as they are trying to cross the busy roads. Putting off the decision on protection for the koala “is really bad news,” said Debbie Pointing, the president of the Koala Action Group. “We’ve worked tirelessly for many years to gather data on the populations,” Pointing said. “That data should be enough to make a decision.” However, Burke pointed out that the Australian government had spent at least $6.3 million on koala conservation efforts since 1996. senators listed efforts that are already underway in Queensland – the construction of special koala bridges as well as fences along roads, to keep the animals out of harm’s way. Some people say that is not enough. “What we’re doing at the moment is likely to drive this species to extinction,” Queensland University zoologist Bill Ellis said. “Koalas are an iconic Australian animal,” Burke told Australians. “They hold a special place in the hearts of Australians.” But it is a fact that if more isn’t done to protect the koala, they might soon hold a place only in Australians’ memories. 小题1:Tony Burke put off announcing the koala as an endangered species because . A.he needed more time to examine latest information B.he doubted whether koalas’ number is decreasing C.he was thinking about ways to protect koalas D.he had more important issues to deal with 小题2:What is Paragraph 3 mainly about? A.The habitat of the koala. B.Australia’s traffic problems. C.The importance of koalas for Australians. D.Reasons for the decrease of the koala population. 小题3:According to the text, Debbie Pointing thinks that . A.the construction of special koala bridges is of little use B.the government should announce the koala as an endangered species C.the government is to blame for the decreasing koala population D.koala are becoming less important in Australians’ hearts 小题4:It can be learned from the text that Tony Burke . A.decided to construct more fences along roads B.called on Australians to take care of the koala C.thought the government has done much for koalas D.was optimistic about the koalas’ future 小题5:What is the main idea of the text? A.Australia puts off the decision on whether the koala is endangered. B.Australia is taking special measures to protect koalas. C.The population of koalas is reducing rapidly. D.Australians are concerned about koalas.
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举一反三
【单选题】有关变频器工作原理的说法不正确的是( )。
A.
将交流电变成直流电,再将直流电变成交流电的过程
B.
给电动机提供频率可控的交流电源
C.
通过整流器转换电源
D.
给电动机提供电压稳定的交流电源
【单选题】变频器的工作原理是通过()(整流单元),将输入的工频交流电转变为直流电,再通过可控硅桥式电路,将直流电转变为电压、频率可以任意调节的交流电。
A.
二极管整流桥
B.
一级管整流桥
C.
晶体管整流桥
D.
整流器
【简答题】变频器的工作原理是将交流电( )成直流电,再将直流电逆变成( )。
【判断题】通用变频器绝大多数是交-直-交型变频器,其工作原理是将外部引入的工频交流电源转换成频率和电压都可以任意改变的交流电源。
A.
正确
B.
错误
【判断题】状态指示灯STOP在用户程序停止运行时灭。
A.
正确
B.
错误
【判断题】《秋浦歌》是李白歌唱爱情和友谊的诗篇之一。()
A.
正确
B.
错误
【单选题】变压器是利用电磁感应原理工作,无论是升压或降压,变压器( ),而不能改变交流电的频率。
A.
只能改变内部感抗
B.
只能改变交流电的电压
C.
只能改变内部电阻
D.
只能改变交流电的相位
【单选题】化脓性脑膜炎抗生素使用原则不正确的是
A.
早期足量用药
B.
联合用药
C.
能透过血一脑屏障
D.
选用敏感抗生素
E.
急性期口服给药
【单选题】膀胱癌的好发部位是
A.
三角区和前壁
B.
三角区和后壁
C.
两侧壁和后壁
D.
顶部和前壁
【单选题】有关变频器工作原理的说法不正确的是( )。
A.
将交流电变成直流电的过程
B.
将交流电变成直流电,再将直流电变成交流电的过程
C.
给电动机提供频率可控的交流电源
D.
给电动机提供电压可控的交流电源
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