更多"GM crop"的相关试题:
[填空题]GM technology is only used on crop plants.
[单项选择]A. Crop production became increasingly specialized.
B. Economic depressions cut the prices of farm products.
C. New banking laws made it easy to buy farmland.
D. America increased its agricultural imports.
[填空题]The United States produced higher crop harvests before roads took away land and pollution affected crops.
[填空题]
Crop Circle Mysteries
They are giant geometric patterns, which appear over-night in a field of crops. Many people believe that they are made by aliens.
(46) . "Crop circle", as the mysterious patterns are called, became a hot phrase this month.
(47) . It’s believed to be the world’s first three-dimensional crop circle. The giant crop circle gives an impression of looking down on skyscrapers from above.
(48) . Crop circles were first widely noticed in the late 1970s as many mysterious circles began appearing-in crop fields throughout the English countryside. People were intrigued by these giant patterns. They were huge (at least tens of meters in diameters) and popped up over-night.
(49) .
Various scientific and pseudo-scientific explanations were put forward to explain the phenomenon. Some hold that they were left by alien spaceships. Others say that they are simply an elaborate prank.
(50)
[填空题]Crop insurance can not be provided by insurance companies because ______does not work in this case.
[单项选择]This crop has similar qualifies to the previous one, ______ both wind-resistant and adapted to the same type of soil.
A. being
B. been
C. to be
D. having been
[单项选择]This crop has similar qualities to the previous one, （） both wind-resistant and adapted to the same type of soil.
A. being
B. been
C. to be
D. having been
[简答题]The crop circles were thought to be the greatest works of modem art, the signs of ______ or landing sites of UFOs.
[填空题]Maize is an unsuitable crop in much of southern Africa because it requires ______.
[单项选择]What is America’s most important food crop（ ）.
A. Wheat.
B. Rice.
C. Barley.
D. Oat.
[单项选择]When next year’s crop of high-school graduates arrive at Oxford University in the fall of 2009, they’ll be joined by a new face: Andrew Hamilton, the 55-year-old provost (教务长) of Yale, who’ll become Oxford’s vice-chancellor—a position equivalent to university president in America.
Hamilton isn’t the only educator crossing the Atlantic. Schools in France, Egypt, Singapore, etc. have also recently made top-level hires from abroad. Higher education has become a big and competitive business nowadays, and like so many businesses, it’s gone global. Yet the talent flow isn’t universal. High-level personnel tend to head in only one direction: outward from America.
The chief reason is that American schools don’t tend to seriously consider looking abroad. For example, when the board of the University of Colorado searched for a new president, it wanted a leader familiar with the state government, a major source of the university’s budget. "We didn’t do any global consideration," says Pa
A. The political correctness.
B. Their ability to raise funds.
C. Their fame in academic circles.
D. Their administrative experience.
