[题目]下图是某地等值线分布图.读图回答下列问题.(1)C.D间的相对高度是 .C.D两地的温差是 .(2)AB间的水平距离约是千米.(3)若站在C点.能否直接看到D点? 因为 .(4)图示范围内是否可能有永久性冰川? 因为 . 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】下图是某地等值线分布图，读图回答下列问题。

（1）C、D间的相对高度是_____，C、D两地的温差是 ______。

（2）AB间的水平距离约是 ____________ 千米。

（3）若站在C点，能否直接看到D点？____因为 __________________ 。

（4）图示范围内是否可能有永久性冰川？_____ 因为 ______________ 。

【答案】

（1）300 1．8°C共2分

（2）4千米 1分

（3）否1分 C D连线通过一道山脊，阻挡了视线2分

（4）否1分根据推算，最高点B气温在0℃以上2分

【解析】

试题分析：

（1）海拔每升高100米，气温下降0.6°C。气温12°C的等值线海拔高度是300米，可以计算出D点海拔是900米。C点海拔是1200米，C、D间的相对高度是300米。同理，计算出C点的温度是6.6°C，C、D两地的温差是1．8°C。

（2）根据图上比例尺，AB间的图上距离约4厘米，所以水平距离约是4千米。

（3）读图，C D之间有一道山脊，阻挡了视线，若站在C点，不能直接看到D点。

（4）根据推算，图中海拔最高点B的气温在0℃以上，不可能有永久冰川存在。

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A．任何发生弹性形变的物体，都具有弹性势能

B．任何具有弹性势能的物体，一定发生了弹性形变

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D．弹性势能具有势能的共性

【题目】【2015·陕西】C

The production of coffee beans is a huge, profitable business, but, unfortunately, full-sun production is taking over the industry and bringing about a lot of damage. The change in how coffee is grown from shade-grown production to full-sun production endangers the very existence of, certain animals and birds, and even disturbs the world’s ecological balance.

On a local level, the damage of the forest required by full-sun fields affects the area’s birds and animals. The shade of the forest trees provides a home for birds and other special(物种) that depend on the trees’ flowers and fruits. Full-sun coffee growers destroy this forest home. As a result, many special are quickly dying out.

On a more global level, the destruction of the rainforest for full-sun coffee fields also threatens(威胁)human life. Medical research often makes use of the forests' plant and animal life, and the destruction of such species could prevent researchers from finding cures for certain diseases. In addition, new coffee-growing techniques are poisoning the water locally, and eventually the world's groundwater.

Both locally and globally, the continued spread of full-sun coffee plantations (种植园)could mean the destruction of the rainforest ecology. The loss of shade trees is already causing a slight change in the world's climate, and studies show that loss of oxygen-giving trees also leads to air pollution and global warming. Moreover, the new growing techniques are contributing to acidic(酸性的) soil conditions.

It is obvious that the way much coffee is grown affects many aspects many aspects of life, from the local environment to the global ecology. But consumers do have a choice. They can purchase shade-grown coffee whenever possible, although at a higher cost. The future health of the planet and mankind is surely worth more than an inexpensive cup of coffee.