[填空题]The survey shows that green food is becoming (popular) _______than traditional food.

[填空题]The survey shows that green food is becoming (popular) _______than traditional food.

[单项选择]The food shows no sign of（）.
A. touched
B. being touched
C. having been touched
D. having touched

[单项选择]
Plants need green leaves to make food. A plant needs sunlight and carbon dioxide (二氧化碳) from the air for making food and it also needs water and salts from the soil to make food too. There are certain cells (细胞) in the leaves which change carbon dioxide and water into sugar. To do this the cells need energy, which they get from the sunlight.
Green leaves make food for the whole plant. A red leaf can make food too because under the red coloring of the leaf there are food-making cells. There are no leaves that are completely yellow, for they can’t make food.
The plant makes sugar for its food. In sunlight green leaves make a lot of sugar. The veins (叶脉) can’t carry all this sugar away, so the leaves change the sugar into starch (淀粉), which is kept and so stored in the leaves. At night, the starch change back to sugar. It is then carried away from the leaves. Some of the sugar is used as food by the plant while the rest is stored as starch. In so
A. How green plants make food.
B. How green plants make sugar.
C. How green plants get their energy.
D. How green plants change sugar into starch.

[单项选择]
Plants need green leaves to make food. A plant needs sunlight and carbon dioxide (二氧化碳) from the air for making food and it also needs water and salts from the soil to make food too. There are certain cells (细胞) in the leaves which change carbon dioxide and water into sugar. To do this the cells need energy, which they get from the sunlight.
Green leaves make food for the whole plant. A red leaf can make food too because under the red coloring of the leaf there are food-making cells. There are no leaves that are completely yellow, for they can’t make food.
The plant makes sugar for its food. In sunlight green leaves make a lot of sugar. The veins (叶脉) can’t carry all this sugar away, so the leaves change the sugar into starch (淀粉), which is kept and so stored in the leaves. At night, the starch change back to sugar. It is then carried away from the leaves. Some of the sugar is used as food by the plant while the rest is stored as starch.
A. How green plants make food.
B. How green plants make sugar.
C. How green plants get their energy.
D. How green plants change sugar into starc

[单项选择]What food shall they buyA. A green salad some potatoes.B. Potatoes and beefsteak.C. A green salad, some beefsteak and potatoes.

[单项选择]One major obstacle to economic development is population growth. The populations of most developing countries grow at a rate much faster than that of in dustrialized countries. One reason for this growth is the high crude birth-rate—the number of live births per 1,000 people.
A. to
B. The populations
C. that
D. live births

[简答题]As a result, the modern world is increasingly populated by intelligent robots whose presence we barely notice but whose universal existence has removed much human labor. And thanks to the continual miniaturization of electronics and micro-mechanics, there are already robot systems that can perform some kinds of brain and bone surgery with far greater precision than highly skilled physicians can achieve with their hands alone. But if robots are to reach the next stage of laborsaving utility, they will have to be able to make at least a few decisions for themselves.
　　Despite a spell of initial optimism in the 1960s and 1970s when it appeared that transistor circuits and microprocessors might be able to copy the action of the human brain by the year 2010, researchers lately have begun to extend that forecast by decades if not centuries.

[单项选择]A. The air pollution. B. The large population.
C. The destruction of forest. D. The Industrial Revolution.

[单项选择]Several years ago, as a measure to reduce the population of gypsy moths, which depend on oak leaves for food, entomologists introduced into many oak forests a species of fungus that is poisonous to gypsy moth caterpillars. Since then, the population of both caterpillars and adult moths have significantly declined in those areas. Entomologists have concluded that the decline is attributable to the presence of the poisonous fungus.
Which one of the following, if true, most strongly supports the conclusion drawn by the entomologists
A. A strain of gypsy moth whose caterpillars are unaffected by the fungus has increased its share of the total gypsy moth population.
B. The fungus that was introduced to control the gypsy moth population is poisonous to few insect species other than the gypsy moth.
C. An increase in numbers of both gypsy moth caterpillars and gypsy moth adults followed a drop in the number of some of the species that prey on the moths.
D. In the past several years, air pollution and acid rain have been responsible for a substantial decline in oak tree populations.
E. (E) The current decline in the gypsy moth population in forests where the fungus was introduced is no greater than a decline that occurred concurrently in other forests.

[单项选择]

The term "disruptive technology" is popular, but is widely misused. It refers not simply to a clever new technology, but to one that undermines an existing technology-and which therefore makes life very difficult for the many businesses which depend on the existing way of doing things. Twenty years ago, the personal computer was a classic example. It swept aside an older mainframe-based style of computing, and eventually brought IBM, one of the world’s mightiest firms at the time, to its knees. This week has been a coming-out party of sorts for another disruptive technology, "voice over internet protocol" (VOIP), which promises to be even more disruptive, and of even greater benefit to consumers, than personal computers.
VOIP’s leading proponent is Skype, a small firm whose software allows people to make free calls to other Skype users over the internet, and very cheap calls to traditional telephones-all of which spells trouble for incumben
A. Almost-free internet phone calls herald the slow death of traditional telephony.
B. Another data service was delivered entirely over the internet.
C. The traditional telephone business have yet to turn a profit.
D. The dramatic shift in the telecoms industry has received little attention.