In this section, we will briefly describe possible ways of reducing the costs and risks ______ in doing this.
A．involving B．involved C．to involve D．being involved
This practice satisfies people of high moral standards psychologically and materially and ______ encourages other people’s enthusiasm.
A．on the contrary B．in the meantime C．from time to time D．all at once
______ city in Zhejiang Province, located on the river’s upper reaches, is believed to be ______ source of the dead pigs.
A．The; a B．The; the C．A; the D．A; a
—Can I use your phone?
—______.
A．By any means B．My pleasure C．With pleasure D．Feel free
Anyone who ever wondered why a dying plant, say, a freshly-cut red rose may appeal to a lady friend, might take some comfort in science, which once again offers us a reasonable answer to one of the world’ s great mysteries.
Beyond a common preference in people for blue, “the long history of color preference studies has been described as ‘confusing and contradictory,” write scientists Anya Hurlbert and Yazhu Ling of England’ s Newcastle University, authors of a new study in the journal Current Biology. “This fact is perhaps surprising,” they said, “though the popularity of the concept that little girls differ from boys in preferring pink.”.
But the scientists believe they have an answer to this scientific mystery, discovering women’s preference for red, hidden above the average liking for blue.
In their study, the pair quickly flashed color cards, displaying many different aspects, at 208 volunteers, mostly Britishers but with a number of Han Chinese, who moved to the United Kingdom recently. Tested in three different experiments, the researchers found out a small but significant preference for reddish colors in the female volunteers.
Puzzled, the authors realized that most of the difference between men and women came in the form of a preference for green VS red in the color cards, regardless of the other slight differences such as the slightly blue ones that everyone liked. Why might this be?
Evolution might offer an answer, they reason. Human color perception（感知）, the assessment of three separate color types-red-green-blue-in our vision is a relatively recent addition to our line of mammals.
Adding weight to their argument, they found the women who are most typically feminine（女性的）on a psychological survey also had the biggest preference for reddish colors. “My love is like a red, red rose,” wrote the Scottish poet Rober Burns in 1794.
1.The scientists discovered the colour mystery that exists between men and women by _____..
A．giving examples B．doing experiments.
C．stating causes and effects D．interviewing volunteers.
2.The word “pair” in Para.4 refers to _____.
A．man and woman B．science and evolution .
C．Anya Hurlbert and Yazhu Ling D．red and green
3.According to the study the scientists have carried out in the passage, _____.
A．men like blue most.
B．women have preference for red besides blue.
C．generally speaking boys prefer slight pink to blue.
D．girls also love slight green.
Dickson Despommier, a public health professor at Columbia University in New York City developed an idea with his students nine years ago. They imagined people in cities growing crops inside a tall building. Tomatoes could grow on one floor of the skyscraper(摩天大楼), potatoes on the next, small animals and fish on the floor above.
This vertical(垂直的) farm, or "farmscraper", could have space for restaurants and other places that serve food, like schools or hospitals. They could serve foods that are truly locally grown.
But why would anyone want to build a farm indoors in a city? Dickson Despommier believes it will become necessary. The world needs to find places to produce enough food to feed the growing population. Space, he says, is an all-important issue.
The professor also points to the problems of traditional farms. They use a lot of freshwater. Their fertilizer and animal waste can pollute water resources. And their growing seasons can be limited.
But inside the vertical farm, crops could grow all year. And there would be no wind to blow away soil. Farmers would not have to worry about too much or too little rain, or about hot summers, freezing winters or insects. And without insects there would be no need for chemicals to kill them.
Farm machines that .use fossil fuels, like tractors, would not be needed either. And water could be recycled for drinking. "The vertical farm reuses everything, so there is no waste," says Professor Despommier.
Even buildings could be saved. Old buildings could become new farms and provide jobs.
The professor has been actively proposing the idea to cities as far away as Dubai and Canada. But so far it exists only in plans and drawings, and a model at the Museum of Science and Industry in Chicago.
Critics say building a farmscraper would cost too much, especially considering the price of land in many cities. Dickson Despommier estimates the cost at about twenty to thirty million dollars.
But he says the building would not have to be very tall. And his graduate students have found many empty lots and unused buildings in New York City that could provide space.
1.According to the passage the purpose of proposing the idea of a farm scraper is to .
A．find places to produce enough food
B．serve food that are truly locally grown
C．prevent polluting the limited land
D．save fresh water
2.Which is one of the advantages of a farm scraper?
A．It costs less
B．It saves labor power.
C．It consumes too much energy
D．It is more environmentally friendly.
3.Those against the idea of farm scrapers argue that
A．it uses too much land in cities
B．it costs too much to build one
C．it causes people to lose their jobs
D．it exists only in unrealistic plans
4.Which of the following is true according to the passage?
A．A vertical farm has been built in Chicago.
B．Old buildings could be changed into new farms.
C．Traditional farms use less water but pollute more water
D．There are some vertical farms being put into use in Canada.
