A.南京 B.上海 C.北京 D.天津

题型:单项选择题

问题:


A.南京

B.上海

C.北京

D.天津

考点:汉语水平考试(HSK)初中等汉语水平考试(HSK)初中等
题型:单项选择题

电梯的安装、改造、维修,必须由()或者其通过合同委托、同意的依照《特种设备安全监察条例》取得许可的单位进行。

A.电梯使用单位 

B.电梯维护单位 

C.电梯安装单位 

D.电梯制造单位

题型:单项选择题

夏季晚上用电高峰时,若供电电压比正常电压降低了20%,则接入电路中的用电器的实际功率会比额定功率减小(  )

A.80%

B.64%

C.20%

D.36%

题型:单项选择题

While students in Hainan are quite used to clear skies, Beijing teenagers are not so lucky. As another warm winter approaches, the city can expect the normal clouds of smoke caused by air pollution.

But things could start to get better soon. The government is co-operating with a US-based environmental protection agency to update existing buses and trucks with clean fuel technology. The new technology could reduce air pollutants in existing diesel vehicles (柴油机) by 40 per cent. The programme will begin by testing buses in Beijing to see if the technology can be applied to them.

“We encourage the development of public transportation. But at the same time we need to reduce pollution from them,” said an official.

Efforts are being made to improve the capital’s environment with tighter controls on emissions (排放). Some heavily polluting factories and construction sites, such as those owned by the steel giant Shougang Group, have been asked to cut production in November and December or be closed.

Beijing was the third polluted city in the world at the end of last century, according to the UN. But thanks to recent measures, the capital has made some progress. Last year 224 clear days were rated as having good air quality. In 1998 the air quality index (指数) gave just 100 days as good.

“I am glad to see an improvement,” said a Senior 1 boy living in the northwest of Beijing. “Compared to other places, the air quality of Beijing is still worrying though. I hate the pollution. Once I was riding my bike in the morning when I almost had a traffic accident because I couldn’t see a car only metres away from me in frog.”

In early October, the skies were covered by such a thick fog that a display show by the visiting French air force was called off.

Rapid development, industry, traffic fumes (烟) and sandstorms from the desert all contribute to the city’s bad air.

小题1:The passage is mainly about ________?

A.a programme to improve Beijing’s air quality

B.progress made in Beijing’s air quality

C.Beijing’s air pollution

D.the difference between Hainan and Beijing小题2:Which of the following is not the measure taken or to be taken to improve Beijing’s air?

A.Clean fuel technology will be used in public transportation.

B.Some factories have been asked to cut production.

C.Some construction sites have been told to be closed.

D.A display show of airplanes has been called off.小题3:We can infer from the passage that, with the aim of being an ecological (生态的) city by the 2008 Olympics, ________.

A.far more still needs to be done

B.nothing else needs to be done

C.all traffic has to be closed

D.the development of the city has to be slowed down小题4:Which is not correct according to the passage?

A.Beijing’s air quality is getting worse and worse.

B.Development, industry, traffic fumes and sandstorms are all the causes of bad air quality.

C.Clouds of smoke in the sky is the common feature in the winter of Beijing.

D.The government is making every effort to stop air pollution.

题型:单项选择题

有性生殖的出现直接推动了生物的进化,其原因是()

A.有性生殖是高等生物所存在的生殖方式

B.有性生殖是经过了两性生殖细胞的结合

C.有性生殖是由减数分裂形成的

D.通过有性生殖,实现了基因重组,增强了生物的变异性

题型:单项选择题

圆筒造球机缺点是利用面积()。

更多题库