问题 选择题

读下图,分析回答下题。

如果此图为热力环流侧视图,则以下说法正确的是(   )

A.引起热力环流的原因是地面冷热不均

B.温度:A>B>C>D

C.热力环流是大气运动最复杂的形式

D.气压D>A>B>C

答案

答案:A

题目分析:引起热力环流的直接原因是地面的冷热不均,故A正确;根据“热空气上升、冷空气下沉”的原理,则A处气温应低于B处,故B项错误;热力环流是大气运动最简单的形式,C错误;垂直方向上气压分布的基本规律:垂直方向上,越往高空气压越低;水平方向上的气流始终由高压指向低压,故D项错误。

点评:本题解题的关键掌握热力环流的形成原因,并能结合图示比较热力环流中的气温、气压高低,应掌握“热空气上升、冷空气下沉”的原理;气压垂直分布和水平分布的基本规律即可。

选择题
阅读理解

SYDNEY 2005-01-01 08:33—Mother of two, Jillian Searle, had to choose between her children when she made a life-or-death decision.

Swept up by mountainous tsunami (海啸) waves at a Thai resort ( 旅游胜地), she could not hold on to both her young sons and survive . Fighting to stay above the waters , she had to choose which one would have to take his chances in the swirling torrent (漩流).

“I knew I had to let go of one of them and I just thought I’d better let go of the one that’s the older,” she told Sky News television in a report broadcast on Thursday. She said she was accompanied by the two boys, Lachie, 5, and two-year-old Blake, and their father, Brad, who had watched the drama helplessly from their first-floor hotel room, when the waves struck. “And I was screaming, trying to find him, and we thought he was dead,” she told reporters on arrival back in Australia. Lachie was found alive about 2 hours later clinging to a door and, looked uninjured as his mother spoke to reporters.

British surfer (冲浪运动员) Martin Markwell is also a lucky man. He had always dreamed of catching that perfect wave –but when it finally came along, it was a nightmare. He was on his surfboard when he was swept up by a tsunami wave.

“It was really terrible because I was surfing, I was really surfing on a wave I wasn’t supposed to be on,” he said. “As an experienced surfer, when I saw the wave come I realized something was wrong, but I couldn’t escape because my surfboard was tied to my ankle.”

His wife Vicki and son Jake looked on in horror from a hotel balcony as he crashed towards the shore. Luckily , he stayed on top of his board until he reached the hotel , jumped off and got to safety as the ocean rolled back to feed a much larger tsunami wave on its way . The family regrouped and ran to safety just minutes before a giant tsunami wave 10 meters high.

小题1:When the waves struck, the father Brad        .

A.reported the disaster to Sky News television

B.was watching a drama play on TV in the hotel

C.tried to find his son lost in the waters

D.watched things going on , unable to do anything小题2:The underlined word “him” refers to        .

A.an old man

B.Lachie

C.Brad

D.Blake小题3:Which of the following is wrong ?

A.Lachie and Martin were both with their family members when the disaster happened.

B.Lachie and Martin both survived from the high waves when tsunami struck.

C.Lachie and Martin were both travelers from Europe on holiday in Thailand.

D.Lachie and Martin were both alive owing to their good luck.小题4:The best title of this news story would be         .

A.Narrow Escape

B.Disaster Caused by Tsunami

C.Exciting Surfing Experience

D.Struggle Against Tsunami