题目内容

【题目】比较西北地区和青藏地区,完成下列表格。

西北地区

青藏地区

主要自然特征

___________

高寒

主要地形

高原和盆地为主

___________为主

河流

河流稀少,多季节性河流,有我国最长的内流河③___________

河流众多,是我国许多河流的发源地

种植业

灌溉农业

___________

制约农业发展的主要因素

___________不足

___________不足

主要的气候类型

_______________

_______________

【答案】干旱 高原 塔里木河 河谷农业 淡水(水资源) 热量 温带大陆性气候 高山高原气候

【解析】

我国幅员辽阔,自然环境复杂多样,形成了各具特色的地理区域.在中国地图上,把秦岭-淮河线、400毫米年等降水量线和青藏高原边缘线这三条重要的地理界线结合起来,并根据实际情况作一定的调整,就把我国划分为四大地理区域,即北方地区、南方地区、西北地区和青藏地区。

西北地区主要自然特征干旱,主要地形是高原和盆地为主,河流稀少,多季节性河流,有我国最长的内流河是塔里木河,属于灌溉农业制约农业发展的主要因素淡水不足,主要的气候类型温带大陆性气候;

青藏地区主要自然特征高寒,主要地形高原为主,河流众多,是我国许多河流的发源地,种植业为河谷农业,制约农业发展的主要因素是热量不足,主要的气候类型是高山高原气候。

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【题目】 A woman in a lab coat stands in front of a group of school children. As she pours hot water into a box of liquid gas in the front of the classroom, the children cheer and clap their hands.

The woman is Kate Biberdorf. She runs a program called Fun with Chemistry which is aimed at getting children interested in science. The demonstrations(演示), such as the one she has just finished, are designed to be interesting and exciting and show children basic rules of chemistry.

Most of the demonstrations involve explosions(爆炸)” and “fire” which are wonderful to watch. One of the demonstrations is called “Elephant's Toothpaste.” Biberdorf creates some foam(泡沫) that increases very quickly in size in the classroom. There is so much foam that it seems as if the foam can be used to clean the teeth of a big animal like an elephant. In another demonstration, Biberdorf makes a fire on her hand and sets a balloon on the fire.

There are also demonstrations designed for certain festivals. For example, Biberdorf uses pumpkins on Halloween. She pours some liquid into a pumpkin. The liquid then explodes inside the pumpkin and makes holes on it. The final product is a jacko'lantern(南瓜灯) with two “eyes” and a “mouth” made by the explosion.

Biberdorf and her program are popular among school children. She_is_happy_when_children_tell_her_how_excited_they_are_after_watching_her_performances._ She is encouraged by their words and is designing more performances. What a great teacher!

1题完成句子; 23题简略回答问题;4题找出并写下第四段的主题句;5题将文中画线句子译成汉语。

1When the teacher ________________ into a box of liquid gas, the children feel excited.

2Why does Kate run the program Fun with Chemistry?

________________________________________________________________________

3What does the writer think of most of Kate's demonstrations?

________________________________________________________________________

4________________________________________________________________________

5________________________________________________________________________

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