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  3. We keep an eye out for wonders, my daughter and I, every morning as we walk down our farm lane to meet the school bus. And where

We keep an eye out for wonders, my daughter and I, every morning as we walk down our farm lane to meet the school bus. And where

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问题     We keep an eye out for wonders, my daughter and I, every morning as we walk down our farm lane to meet the school bus. And wherever we find them, they reflect the magic of water: a spider web drooping with dew like a necklace. A rain-colored heron rising from the creek bank. One astonishing morning, we had a visitation of frogs. Dozens of them hurtled up from the grass ahead of our feet, launching themselves, white-bellied, in bouncing arcs, as if we’d been caught in a downpour of amphibians. It seemed to mark the dawning of some new watery age. On another day we met a snapping turtle in his olive drab armor. Normally this is a pond-locked creature, but some ambition had moved him onto our gravel lane, using the rainy week as a passport from our farm to somewhere else.
    The little, nameless creek tumbling through our hollow holds us in bondage. Before we came to southern Appalachia, we lived for years in Arizona, where a permanent brook of that size would merit a nature preserve. In the Grand Canyon State, every license plate reminded us that water changes the face of the land, splitting open rock desert like a peach, leaving mile-deep gashes of infinite hue. Cities there function like space stations, importing every ounce of fresh water from distant rivers. But such is the human inclination to take water as a birthright that public fountains still may bubble in Arizona’s town squares and farmers there raise thirsty crops. Retirees from rainier climates irrigate green lawns that impersonate the grasslands they left behind. The truth encroaches on all the fantasies, though, when desert residents wait months between rains, watching cacti tighten their belts and roadrunners skirmish over precious beads from a dripping garden faucet. Water is life. It’s the salty stock of our origins, the pounding circulatory system of the world. It makes up two-thirds of our bodies, just like the map of the world; our vital fluids are saline, like the ocean. The apple doesn’t fall far from the tree.
    Even while we take Mother Water for granted, humans understand in our bones that she is the boss. We stake our civilizations on the coasts and mighty rivers. Our deepest dread is the threat of having too little moisture — or too much. We’ve lately raised the Earth’s average temperature by 0.74°C, a number that sounds inconsequential. But these words do not: flood, drought, hurricane, rising sea levels, bursting levees. Water is the visible face of climate and, therefore, climate change. Shifting rain patterns flood some regions and dry up others as nature demonstrates a grave physics lesson: Hot air holds more water molecules than cold.
    The results are in plain sight along beaten coasts from Louisiana to the Philippines as super-warmed air above the ocean brews superstorms, the likes of which we have never known. In arid places the same physics amplify evaporation and drought, visible in the dust-dry farms of the Murray-Darling River Basin in Australia. On top of the Himalaya, glaciers whose melt water sustains vast populations are dwindling. The snapping turtle I met on my lane may have been looking for higher ground. Last summer brought us a string of floods that left tomatoes spoilt on the vine and our farmers needing disaster relief for the third consecutive year. The past decade has brought us more extreme storms than ever before, of the kind that dump many inches in a day, laying down crops and utility poles and great sodden oaks whose roots cannot find purchase in the saturated ground. The word "disaster" seems to mock us. After enough repetitions of shocking weather, we can’t remain indefinitely shocked.
    How can the world shift beneath our feet? All we know is founded on its rhythms: Water will flow from the snowcapped mountains, rain and sun will arrive in their proper seasons. Humans first formed our tongues around language, surely, for the purpose of explaining these constants to our children. What should we tell them now? That "reliable" has been rained out, or died of thirst? When the Earth seems to raise its own voice to the pitch of a gale, have we the ears to listen?
According to the context, what is the fundamental role of water?
选项 A、To keep living things alive.
B、To irrigate green grasses.
C、To provide public fountains.
D、To forecast climate changes.
答案A
解析 细节判断题。定位到第3段。该段首句指出，人类将水视为母亲，在我们骨子里都认为水是我们的老板，即没有水就没有我们，因此水是使我们生命得以维持的救世主。只有A项能概括作者的意思，其他三个选项虽然也说出了水的功能，但不是最根本性的，故排除。
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