如果某种商品的价格上升1%，销售量下降2%，则此种商品的需求价格弹性是( )

金融机构由分业经营向混业经营开始发展意味着金融管制开始放松。A．正确 B．错误

不定项选择金融机构由分业经营向混业经营开始发展意味着金融管制开始放松。

只有多于一条多肽链的蛋白质分子才有四级结构。单独的亚基不具有生理活性，只有亚基相互结合构成的四级结构才有生理活...

判断题只有多于一条多肽链的蛋白质分子才有四级结构。单独的亚基不具有生理活性，只有亚基相互结合构成的四级结构才有生理活性。
A、正确
B、错误

Some people claim that technology creates more problems...

未知题型Some people claim that technology creates more problems than it solves, and may threaten or damage the quality of lifE.What do you think of this statement? Write an essay of about 400 words.
In the first part of your essay you should state clearly your main argument, and in the second part you should support your argument with appropriate details. In the last part you should bring what you have written to a natural conclusion or make a summary.
You should supply an appropriate title for your essay.
Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks.