题目内容
（请给出正确答案）
A.main stem stop valve
B.auxiliary steam stop valve
C.feed check or control valve
D.blow down valve
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更多“The ____ enables water to be b…”相关的问题
第1题
A.main stern stop valve
B.auxiliary steam stop valve
C.scum valve
D.blow down valve
第2题
Plants in Desert
Only special plants can survive in the terrible climate of a desert, for these are regions where the annual range of the soil temperature can be over 75℃. Furthermore, during the summer there are few clouds in the sky to protect plants from the sun's ray. Another problem is the fact that there are frequently strong winds which drive small-sharp particles of sand into the plants, tearing and damaging them. The most difficult problem for all forms of plant life, however, is the fact that the entire annual rainfall occurs during a few days or weeks in spring.
Crasses and flowers in desert survive from one year to the next by existing through the long, hot, dry season in the form. of seeds. These seeds remain inactive unless the right amount of rain falls. If no rain falls, or if insufficient rain falls, they wait until the next year, or even still the next. Another factor that helps these plants to survive is the fact that their life cycles are short. By the time that the water from the spring rains disappears--just a few weeks after it falls--such plants no longer need any.
The perennials(多年生植物)have special features which enable them to survive as plants for several years. Thus, nearly all desert perennials have extensive root systems below ground and a small Shoot system above ground. The large root network enables the plant to absorb as much water as possible in a short time. The small shoot system, on the other hand, considerably limits water loss by evaporation (蒸发)。
Another feature of many desert perennials is that after the rainy season they lose their leaves in preparation for the long, dry season, just as trees in wetter climates lose theirs in preparation for the winter. This reduces their water loss by evaporation during the dry season. Then, in the next rainy season, they come fully alive once more, and grow new branches, leaves and flowers, just as the grasses and flowers in desert do.
Ordinary plants can not survive the desert weather as a result of the following EXCEPT for ______.
A．the strong winds
B．the strong sun's ray
C．the long summer days
D．the high soil temperature
第3题
What does Barney Foran think of the new report？
A.It urges people to take shorter showers to save water.
B.It enables people to be wiser in selecting products.
C.It offers a new tool to save the urban water supplies.
D.It informs people of a fresh sustainability rating.
第4题
第5题
What does the new system enable the farmers to do？
A．Produce vegetables of better taste.
B．Transport produce more quickly.
C．Grow crops in nontraditional climates.
D．Keep vegetables fresh for a longer period.
第6题
A．The man is thinking about taking a new job.
B．The man likes the job that enables him traveling.
C．The man is sure that he can gain more by taking the job.
D．The man doesn't want to stay home and take care of his child.
第7题
A.Y.是
B.N.否
第8题
As consumers students need training because this enables them to______.
A．handle their credit cards with caution
B．control their money carefully so that they don't go broke
C．make wise purchasing decisions and be informed about consumer services
D．cope with serious financial problems
第9题
请根据以下内容回答 60～64 题
A．An organ of higher plants， usually subterranean and having several functions，including the absorption and conduction of water and dissolved minerals， food storage，and anchorage of the plant in the soil. It is distinguished from the stem by its structure，by the manner in which it is formed， and by the lack of such appendages as buds and leaves.
B．It grow horizontally， as a food-storing organ， beneath the surface of the ground， and enables a plant to reproduce itself.It has nodes， buds，and tiny leaves and does not die when cut； replanted， it yields new plant.
C．both A and B
D．neither A nor B
第 60 题 一种起运输作用的器官是（）
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