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发布时间:2023-10-23 15:07:20

[单项选择]After years of research, scientists have ______ the virus that is responsible for the disease.


A. recognized
B. identified
C. guaranteed
D. notified

更多"After years of research, scientists"的相关试题:

[单项选择]After years of research, scientists have ______the virus that is responsible for the disease.


A. recognized
B. identified
C. guaranteed
D. notified
[单项选择]After thirty years of television, people have become "speed watchers". Consequently, if the camera lingers, the interest of the audience ______.
A. broadens
B. begins
C. varies
D. flags
[单项选择]Scientists have been eager to ______ for research funds without thinking over the impact of the research.
A. scramble
B. tumble
C. bubble
D. couple
[单项选择]I shall have a companion in the house after all these ______ years.


A. alone
B. lonely
C. single
D. simple
[单项选择]According to some scientists' research findings, dolphins seldom sleep because _______.


A. of their stupidity
B. of their vulnerability
C. there are possible dangers in the ocean
D. aquatic mammals do not need sleep
[单项选择]After years of strenuous work, the scientists are on the __________.of a great discovery of human gene.


A. domain
B. premise
C. threshold
D. pretext
[单项选择]

Text 1
Shortly after September 11th, President Bushes father observed that just as Pearl Harbor awakened this country from the notion that we could somehow avoid the call of duty to defend freedom in Europe and Asia in World War Two, so, too, should this most recent surprise attack erase the concept in some quarters that America can somehow go it alone in the fight against terrorism or in anything else for that matter.
But America’s allies have begun to wonder whether that is the lesson that has been learned——or whether the Afghanistan campaign’s apparent success shows that unilateralism works just fine. The United States, that argument goes, is so dominant that it can largely afford to go it alone.
It is true that no nation since Rome has loomed so large above the others, but even Rome eventually collapsed. Only a decade ago, the conventional wisdom lamented an America in decline. Bestseller lists featured books that describ
A. Indifferent.
B. Optimistic.
C. Indignant.
D. Apprehensive.

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