问题 综合

读“东半球”图,完成下列各题。(共20分,每空2分。)

(1)东西半球的分界线为__________。

(2)a点的经度是__________,b点的纬度是__________。

(3)图中A是__________洲 (大洲),它有世界上最高的__________高原。B为__________洲(大洲),它的大部分范围属于__________(高、中、低)纬度。

(4)A、B两大洲的分界线是__________运河、红海、曼德海峡。

(5)C是__________洲(大洲),D为__________洋(大洋)。

答案

(1)20°W,160°E

(2)20°W,0°

(3)亚洲,青藏高原,非洲,低纬

(4)苏伊士运河

(5)南极洲,印度洋

题目分析:

(1)东西半球是以西经20°和东经160°经线圈为界的。西经20°以东、东经160°以西为东半球,西经20°以西、东经160°以东为西半球。

(2)a点在0°经度经线以西且在20°经线上,所以a点的经度是20°W,b点在赤道上,所以b点的纬度是0°。

(3)世界上最高的高原是青藏高原,它在亚洲,所以图中A是亚洲。从图上B所在州的轮廓看是非洲,它的中部有赤道穿过,所以大部分范围属于低纬度。

(4)亚洲、非洲的分界线是苏伊士运河。

(5)C位于南极附近,是南极洲,D位于亚洲南部,是印度洋。

点评:

(1)南北半球的分界线:赤道(0°纬线);东西半球的分界线:20°W、160°E。

(2)确定经纬度,首先确定是东经还是西经,是北纬还是南纬,再根据度数写出经纬度。

(3)各大洲分界线:

①亚洲和欧洲的分界线——乌拉尔山、乌拉尔河、大高加索山脉和土耳其海峡;

②亚洲和非洲的分界线——苏伊士运河;

③北美洲和南美洲的分界线——巴拿马运河;

④北美洲和亚洲的分界线——白令海峡;

⑤南美洲和南极洲的分界线——德雷克海峡;

⑥欧洲和北美洲的分界线——丹麦海峡;

⑦欧洲和非洲的分界线——直布罗陀海峡。

单项选择题
阅读理解

People say time is relative.But relative to what.I do know that sometimes time“seems”to be moving slower.Remember Christmas Eve when you were a child? It was the longest night of the year.It lasted forever! And now it seems like I just paid my bill yesterday...and it’s due again!  

People tell me all too frequently…I need more time! Oh ,really?…Mother Teresa,Michelangelo,and Helen Keller all had 24 hours a day.Look what they did with their time!

Is it that we need to manage our time better…or our priorities(重点)?You’ve heard the expression“first things first.”The first step in understanding the power of time is to understand that it is limited.Why is it then that some people get a lot more done? We know the answer.They use their time smartly.   

One day an expert on time management was speaking to a group of students and announced a quiz.He pulled out a wide-mouthed jar.Next,he placed about a dozen fist-sized rocks,one at a time , into the jat, until no more would fit.“Is it full?” he asked.”Yes,”responds the class.”Oh really?” he asked.So he took out a bucket of gravel(砂砾), which he managed to work down into the spaces between the larger rocks.“Is it full now?” he asked.

Wising up,one answered,‘'Probably not.”Sure enough, he took out a bucket of sand,which he poured into the empty spaces.”Is it full now?” he asked.”No,” reply the students confidently.So he took a glass of water and filled it in.Then he asked,“What is my point?’’

One said,‘'No matter how full your schedule is,if you try really hard,you can always fit some more things into it!”

“No,”the speaker replied,“It tells us if you don’t put the big rocks in first, you’ll never get them in at all.’’

What are the big rocks? The things you should put in to your jar first.

The rich don’t get 25 hours and the poor don’t get 23…we all get the same.Let’s use them wisely! Invest your time wisely!

49.What does the point of the quiz lie in_______.

A.How to put more things into ajar. B.How well the students learn the lesson.

C.How to get more done in limited time      D.The skill and order is very important.

50. “The big rocks”in this passage refers to_______?

A.difficult points.        B.advantages     C.minor things           D.focuses

51. How is the passage mainly developed?

A.By inferring.             B.By comparing.

C.By listing examples.        D.By giving facts.

52. The text is written mainly            

A.to explain the origin of the expression “first things first”

B.to call on us to use our time in a smart manner   

C.to introduce a meaningful class given by an expert

D.to tell us about the relativity and the power of time