下列物质能在PH=1的溶液中大量共存，且为无色透明溶液的是[ ] A.KOH、N

患者男性，57岁。左眼视力下降伴视物变形1周。视力：右眼1.0；左眼0.1。眼底检查发现左眼黄斑区视网膜下片状出血。

左眼最可能的诊断是（）

A.病理性近视黄斑出血

B.中心性渗出性脉络膜视网膜炎

C.糖尿病视网膜病变

D.湿性老年性黄斑变性

E.黄斑裂孔

China news, Beijing, Feb. 9 – Housing price in China has always aroused heated discussions among property developers（房产开发商）and ordinary Chinese. To many property developers and local government officials, housing price in China is still low compared with many developed countries. However, the average housing price in the United States is only 8,000 yuan per square meter, while in China, it is even higher than in the United States. This shows that there are some bubbles(泡沫) in Chinese real estate market, the International Finance News reported.

Although the average price of residential houses in the United States, after converted（转换）to Renminbi, is about 8,000 yuan per square meter, the houses in US are not sold in terms of building area, as most Chinese property developers do when they sell their houses. If US property developers sell their houses according to the building area, then the housing price will be even lower than 8,000 yuan per square meter. In most big Chinese cities, such as Beijing, Shanghai, and Shenzhen, houses are sold a t a price even higher than those in the US.

The high housing sales price in large cities in China proves that Chinese real estate（房地产）market does have some bubbles. Moreover, Chinese houses can not be compared with houses in US in terms of building quality, environment and supporting facilities. Furthermore, it should be noted that American people’s average income is several dozen times higher than that of Chinese people. How can the Chinese afford to buy a house which is even more expensive than that sold in US?

At the beginning of 2007, Chinese government issued a set of policies that aimed to benefit the public. Now in order to reduce the high housing prices, the government can regulate (控制) the real estate market by raising tax on property industry and controlling the release of loans（贷款）and lands to property developers. At the same time, the government should allow people to build more houses through various fund-raising channels, such as funds collected from buyers or raised by working units. By applying these multiple means, it is expected that the high housing prices can be lowered.

小题1:What is the average housing price per square meter in China?

A．8000 yuan.

B．10000 yuan.

C．7000 yuan.

D．it’s not mentioned here.小题2:Which of the following does NOT support the idea that the average housing price in China is  even higher than in the United States?

A．Chinese houses can not be compared with houses in US in terms of building quality, environment and supporting facilities.

B．American people’s average income is several dozen times higher than that of Chinese

people.

C．The houses in US are not sold in terms of building area, as most Chinese property

developers do when they sell their houses.

D．There population who need houses in China than in the United States.小题3:How many measures are mentioned in the last paragraph in order to reduce the high housing  prices?  

A．Four.

B．Three.

C．Tow.

D．One.小题4:What is the main idea of this passage?

A．The housing price in China is so high that the government should do something useful to

prevent it.

B．There are some bubbles in Chinese real estate market.

C．The average housing price in China is even higher than in the United States.

D．The Chinese government issued a set of policies that aimed to benefit the public.

水在焦化生产上有哪些用途？

第二次世界大战期间，海洋上航行的商船常常遭到德国轰炸机的袭击，许多商船都先后在船上架设了高射炮。但是，商船在海上摇晃得比较厉害，用高射炮射击天上的飞机是很难命中的。战争结束后，研究人员发现，从整个战争期间架设过高射炮的商船的统计资料看，击落敌机的命中率只有4％。因此，研究人员认为，商船上架设高射炮是得不偿失的。以下哪项如果为真，最能削弱上述研究人员的结论

A．在战争期间，未架设高射炮的商船，被击沉的比例高达25％；而架设了高射炮的商船，被击沉的比例只有不到10％。

B．架设了高射炮的商船，即使不能将敌机击中，在某些情况下也可能将敌机吓跑。

C．架设高射炮的费用是一笔不小的投入，而且在战争结束后，为了运行的效率，还要再花费资金将高射炮拆除。

D．一般地说，上述商船用于高射炮的费用，只占整个商船的总价值的极小部分。