问题 选择题
2002年诺贝尔物理学奖中的一项,是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源.X射线是一种高频电磁波,若X射线在真空中的波长为λ,以h表示普朗克常量,c表示真空的光速,以E和m分别表示X射线每个光子的能量和质量,则(  )

A.E=,m=0

B.E=,m=

C.E=,m=0

D.E=,m=

答案

答案:D

阅读理解

Children are being indirectly affectly by the impact of the recession (经济衰退) on their parents, the Children’s society warns.

The chief executive of the Children’s Society, Bob Reitemeier, said that children were “on the front of recession”. He said the recession made it even more important to try to end child poverty.

The answers suggest children from poorer backgrounds are more likely to be affected, but over a third of children across all backgrounds said they were aware that the recession was worrying their parents.

Fifteen-year-old Patricia said her family felt the impact of the recession on their everyday budget(预算). “We have to save up our money and do not spend it so much on unnecessary things,”she said.

Those questioned appeared to have great awareness of the economic crisis, which, unsurprisingly, was higher among the older children. But around 15% said they hadn’t been affected by it.

Recent figures showed that in 2007 there were 850,000 young people with no particular occupation. An official from the government said it was so “disappointing” that some young people were concerned about the economy.

Parents are clearly best placed to talk to their children about their worries, but schools also play an important role in teaching young people the skills they need to become healthy, happy and confident individuals.

(    )68.Which of the following is true?

A. It is more important to try to end child poverty in the recession.

B.Children from poorer areas are less likely to be affected.

C.All the children questioned are worried about the economy.

D.That some young people are worrying about the economy is “good news”.

(    )69.What does the underlined word “it” refer to in Paragraph 5?

A. The poorer background.   B.The impact of the recession. 

C. Everyday budget.        D.The government.

(    )70.What’s the main idea of the passage?

A. Many children are concerned about the recession.

B.Children are being directly affected by the recession.

C.The recession affected children indirectly.

D. Schools play an important role in teaching young people how to become healthy, happy and confident individuals. 

判断题