更多"The scientists have made an ______s"的相关试题:
[单项选择]Scientists have made a __________ in their combat against the AIDS.
A. breakup
B. breakdown
C. breakthrough
D. breakout
[单项选择]Scientists wilt have to ______ new methods of increasing the world's food supply in order to feed more hungry people.
A. catch up with
B. come up with
C. keep up with
D. put up with
[单项选择]The study was made by ______
A. Edinburgh University
B. the World Health Organization
C. Oxford University
D. Edinburgh University and the World Health Organization
[单项选择]
Scientists have established that influenza viruses taken from man can cause the disease in animals. In addition, man can catch the disease from animals. In fact, a great number of wild birds seem to carry the virus without showing an evidence of illness. Some scientists concluded that a large family of influenza viruses may have evolved in the bird kingdom, a group that has been on the earth 100 million years and is able to carry the virus without contracting the disease. There is even convincing evidence to show that virus strains are transmitted from place to place and from continent to continent by migrating birds.
It’s known that two influenza viruses can recombine when both are present in an animal at the same time, the result of such recombination is a great variety of strains containing different H and N spikes. This raises the possibility that a human influenza virus can recombine with an influenza virus from a low animal to produce an entirely new s
A. H and N spikes are produced
B. animal and bird viruses are combined
C. dissimilar types of viruses recombine
D. two viruses of the same type are contracted
[单项选择]Many of these individuals have made wills and have asked trust departments to act as ______.
A. principal
B. executor
C. manager
D. supervisor
[单项选择]I have made an appointment with my dentist to have my tooth pulled out this afternoon.
A. 今天下午我和给我拔牙的牙医有个约会。
B. 今天下午我和牙医约好找个医生给我拔牙。
C. 我和牙医约好今天下午来拿我拔掉的那颗牙。
D. 我指定了一个牙医今天下午给我拔牙。
[单项选择]Scientists have already found problems that associated（）living in the ocean are nearly the same as those of living in outer space.
A. to
B. of
C. with
D. at
[单项选择]Social scientists have recently become greatly interested in space because ______.
A. space industrialization will create new markets and more jobs on Earth
B. space exploration will be harmful to man
C. space colonization is near at hand
D. otherwise technologists will catch the opportunity to go to space
[单项选择]The passage probably implies that scientists have been______.
[单项选择]Scientists have traditionally (classified) plants by (grouping them) according to similarities in their overall (appear), their internal structure, and the form of their (reproductive) organs.
A. classified
B. grouping them
C. appear
D. reproductive
