题目内容

【题目】下图中甲是我国东部河流某河段示意图,乙是河流A、B两水文站测得的水位变化图。读图,完成下列各题。

【1】甲图中AB段河流

A由西北流向东南 B由东南流向西北

C水位A处低于B处 DB处河水流速快于A处

【2】乙图中河流出现最高水位时,可能是由于出现下列现象中的何种现象造成的

A气旋活动频繁 B梅雨连绵

C冰雪融化 D春雨霏霏

【答案】

【1】A

【2】B

【解析】

试题分析:

【1】根据图乙分析,A水位站水位季节变化大,说明位于漂泊上游,没有湖泊调节作用影响。B水文站水位变化小,说明位于湖泊下游,受到湖泊调节径流的作用影响。所以甲图中AB段河流自A流向B,即由西北流向东南,A对,B、C、D错。

【2】根据乙图中A水位线的特点,河流出现最高水位时是6月,7、8月份水位较低该地可能是长江中下游地区,6月份是梅雨天气,降水多,径流量大。7、8月份是伏旱天气所以降水少,径流量下降。是由梅雨连绵的天气造成的,B对。A、C、D错。

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【题目】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 worlds ecological balance.

On a local level, the damage of the forest required by full-sun fields affects the areas birds and animals. The shade of the forest trees provides a home for birds and other species(物种)that depend on the trees flowers and fruits. Full-sun coffee growers destroy this forest home. As a result, many species 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 worlds 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 worlds climate, and studies show that the 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 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.

【1】What can we learn about full-sun coffee production from Paragraph 4?

A. It limits the spread of new growing techniques.

B. It leads to air pollution and global warming.

C. It slows down the loss of shade trees.

D. It improves local soil conditions.

【2】The purpose of the text is to .

A. entertain B. advertise

C. instruct D. persuade

【3】Where does this text probably come from?

A. An agricultural magazine. B. A medical journal.

C. An engineering textbook. D. A tourist guide.

【4】Which of the following shows the structure of the whole text?

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