题目

阅读理解 Researchers may have found a way to keep plants from dying of thirst. They developed a soil additive (添加剂). It will steal water from the air to share with plants. Their invention is a super-moisture-absorbent gel (SMAG，高吸湿凝胶). It absorbs water from the air during the night. When the sun warms it the next day, that gel releases its accumulated water into the root zone of the plants. Guihua Yu, an engineer at the University of Texas at Austin, led the team that developed the gel. The gel mixed with soil absorbs water and holds it. The next day, rather than allowing it to evaporate (蒸发), the gel instead slowly releases that water into the soil. The engineers tested the soil additive to grow carrots. During an experiment, they compared carrots grown in sandy soil alone with carrots grown in sandy soil that had been mixed with the get. The gel-treated soil lost about 60 percent of the water after about a month. In contrast, the untreated soil lost 80 percent of its water in just one week. Jeff Hattey is a soil scientist. He says similar additives have been used in potting soil for many years. He says the gel works in a similar way. “The big questions for me are, first, how much SMAG-soil would you have to use? How long does it last once it's in the soil?” Yu believes future studies will help his team understand if the gel could be used for larger, outdoor fields. If it can, the water in the air could allow crops to be grown in dryer climates, where irrigation is not practical. It shouldn't hurt the bacteria or worms that are needed to keep soil healthy for growing things. The gel also should pose no risks if it washes into lakes or streams. The research team hopes to confirm that in the near future. （1） How does SMAG get water? A . By absorbing water from the root zone. B . By absorbing water from air. C . By absorbing water from plants. D . By absorbing water from soil. （2） What can we infer from Hattey's words? A . The SMAG is a totally new invention. B . People will use SMAG-soil soon. C . Scientists have to do more for SMAG. D . SMAG has a lot of advantages. （3） What will Guihua Yu probably do in the near future? A . Let SMAG have fewer side effects on soil. B . Prove whether SMAG is safe to environment. C . Make SMAG keep soil healthy. D . Make SMAG acceptable by people. （4） What may be the suitable title for the text? A . An invention of making plants grow in a dry climate B . An invention of making plants grow quickly C . An invention of defeating droughts D . An invention of protecting the soil 答案： B C B A

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