题目内容

【题目】读“某地区等高线图”(单位:米),完成下面小题。

1图中山峰与甲村的相对高度可能是(   )

A. 550米B. 950米C. 750米D. 850米

2环保部门在桥梁下的河水里检测出农药残留物,这些农药残留物最可能来自(   )

A. ①地B. ②地C. ③地D. ④地

3图示地区欲发展旅游业,你认为该地区优美的景观主要体现在(   )

A. 幽谷藏寺B. 急流飞瀑

C. 海滩峡谷D. 湖光山色

【答案】

1A

2B

3D

【解析】

试题

1】相对高度是指某个地点高出另一个地点的垂直高度.

解:读图分析可得,图中等高距是100米,山峰的海拔高度范围是900﹣1000米之间,甲村的海拔高度范围是300﹣400米之间,则甲村和图中山峰的相对高度是500﹣700米;依据题意.

故选:A

2】在等高线地形图上,等高线闭合且等高线数值中间高四周低则为山顶,两山顶之间相对低洼的部位为鞍部,等高线闭合且等高线数值中间低四周高则为盆地,等高线向海拔低处凸为山脊,等高线向海拔高处凸为山谷,等高线重合的地方为陡崖.等高线密集表示坡陡,等高线稀疏表示坡缓.

解:河流分布在山谷地区,河流从海拔高处流向海拔低处;读图可得,图中河流的流向是自西南向东北流,图中的点位于甲村的上源,且该地地形平坦、开阔,适宜发展种植业,故点有农药使用的最大可能.依据题意.

故选:B

3】在等高线地形图上,等高线闭合且等高线数值中间高,四周低则为山顶;两山顶之间相对低洼的部位为鞍部;等高线闭合且等高线数值中间低,四周高则为盆地;等高线向海拔低处凸为山脊;等高线向海拔高处凸为山谷,等高线重合的部位是陡崖.

解:读图分析可得:

图中古寺分布在山顶附近,故A错误;

瀑布应该分布在陡崖地区,陡崖是指等高线重合的部位,图中没有陡崖,故B错误;

图中没有显示濒临海洋,故C错误;

图中的河流、湖泊较多,故D正确;依据题意.

故选:D

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【题目】

Earth's atmosphere (大气) is made of the layers of air that is around Earth. Thanks to the O2 found in the atmosphere, humans and other animals can breathe.

The atmosphere has four layers. The closest layer to Earth is the troposphere. The troposphere reaches from Earth to about 8 to 15 kilometers above sea level (平面).

It includes most of the air and O2 in the atmosphere, so all life on Earth lives here. The closer to the ground, the warmer the air is. Higher up in the troposphere, the air becomes much colder.

The second layer of the atmosphere is the stratosphere. The stratosphere reaches to around 50 kilometers above Earth. Near the top of the stratosphere is the ozone layer (丑氧层). The ozone layer helps protect life on Earth from the sun's UV radiation. Unluckily, there are holes in several parts of the ozone layer. This could cause serious problems for life on Earth.

The third layer of the atmosphere is the mesosphere. It reaches up to around 80 kilometers above Earth. The mesosphere has the coldest temperature in the atmosphere, It can be as cold as -100℃ there.

The fourth layer is called the thermosphere. It reaches up to around 600 kilometers above Earth. This is where outer space begins. The international space station runs around the planet from this layer. The temperature here is very high. It gets up to 1,200℃.

1The troposphere goes up to around ____________ above the Earth.

A. 8-15 kilometersB. 50 kilometersC. 80 kilometersD. 600 kilometers

2The ______________ is the coldest layer in the atmosphere.

A. troposphereB. stratosphereC. mesosphereD. themosphere

3According to the passage, which of the following statements is TRUE?

A. In the troposphere, the closer to the ground, the colder the air is.

B. The ozone layer could cause problems for life on Earth.

C. Outer space begins from the mesosphere.

D. The temperature in the thermosphere can be 1200℃.

4Which of the following shows the structure (结构) of the passage? (P: Paragraph)

A. B. C. D.

5________________ may be the best title of the passage.

A. What Makes up the AtmosphereB. Where Is the Atmosphere

C. The Distance of the AtmosphereD. The Temperature of the Atmosphere

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