问题
选择题
读下图回答1—2题。
1、图中四种光照状况中，太阳辐射被削弱最多的是 [ ]
A、A
B、B
C、C
D、D
2、太阳辐射通过大气层时被削弱的原因正确的是 [ ]
A、臭氧吸收了太阳光线中的所有紫外线
B、云层对太阳辐射的散射
C、水汽和二氧化碳对太阳辐射中波长较长的红外线的吸收
D、空气分子对太阳辐射的反射使得天空呈蔚蓝色
答案
1、D
2、C
搜题请搜索小程序“爱下问搜题”
读下图回答1—2题。
1、图中四种光照状况中，太阳辐射被削弱最多的是 [ ]
A、A
B、B
C、C
D、D
2、太阳辐射通过大气层时被削弱的原因正确的是 [ ]
A、臭氧吸收了太阳光线中的所有紫外线
B、云层对太阳辐射的散射
C、水汽和二氧化碳对太阳辐射中波长较长的红外线的吸收
D、空气分子对太阳辐射的反射使得天空呈蔚蓝色
1、D
2、C
| 完形填空。 | ||||
| When you sit and watch TV hour after hour, do you ever think of what it may be doing to your health? More and more children are becoming over weight (超重)and near-sighted 1 they spend too much time in front of the TV. Also, they are growing less and less creative (有创造性的) since watching TV doesn't 2 any active thought (积极的思维). Last week, the TV-Turnoff Organization（组织）began its ninth TV-Turnoff 3 in the US. The organization encourages people to play games, read books, lie under a tree, talk to family members and friends 4 watching TV. American school children spend, on average, 5 hours a year watching TV-more time than they spend in school. That's too much, say the doctors 6 organized this year's TV-Turnoff Week. Doctors say that the 7 children+ watch television, the more overweight they may become. And the food children eat while they watch the television makes this weight 8 more serious. To keep mentally and physically healthy, children need to take exercise, talk with friends and family, read, and 9 the world around them. Could you go a week without television? It might be 10 for many TV lovers, but why not give it a try? | ||||
|