[题目]“中国龙 ---黄河哺育了灿烂的中华文明.但其身体上也存在许多“病症 .读图.回答下列问题.[1]黄河各河段“病症的成因及对症的“药方组合正确的是( )A．“大量脱发 -----气候寒冷干旱-加高.加固堤坝B．“腹泻 -----地表植被遭到破坏-退耕还林.还草C．“脚肿 -----黄土结构疏松.地表崎岖-在下游修筑梯田D．“动脉阻题目和参考答案——青夏教育精英家教网—

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【题目】“中国龙”---黄河哺育了灿烂的中华文明，但其身体上也存在许多“病症”。读图，回答下列问题。

【1】黄河各河段“病症”的成因及对症的“药方”组合正确的是( )

A．“大量脱发”-----气候寒冷干旱—加高、加固堤坝

B．“腹泻”-----地表植被遭到破坏—退耕还林、还草

C．“脚肿”-----黄土结构疏松，地表崎岖—在下游修筑梯田

D．“动脉阻塞”-----过度放牧与垦殖—建立自然保护区

【2】黄河上游进行梯级开发的有利条件是( )

A．地处我国阶梯交界处，河流落差大

B．属于亚热带季风气候，年降水量大

C．地势平坦，水量大，水流平缓

D．地处北方地区，气温高，蒸发旺盛

【答案】

【1】B

【2】A

【解析】

试题分析：

【1】“大量脱发”指荒漠化，是干旱地区地表植被受到破坏造成的，不能用加固大坝来解决，A错；“腹泻”指的是水土流失，主要是地表植被严重破坏造成的，要加强退耕还林、增加地表植被覆盖率，B正确；“脚肿”指地上河，地上河的发生也和中游地区的水土流失有关，但不晨下游修梯田，而应加固大坝， C错；“动脉阻塞”指的凌汛现象，不是过度放牧造成的，应当是疏浚河道，而不是建立自然保护区， D错。选B正确。

【2】黄河上游地处我国地势阶梯交界处，河流落差大，水能资源丰富；这里是温带大陆性气候，年降水量较少；上游进行梯级开发主要是利用河流的水能。选A正确。

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【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.