[单项选择]Even researchers, for example, ______ applying the concept of "cohesion" may not produce the most cost-effective science.
A. appreciate for
B. appreciate that
C. appreciate as to
D. appreciate as

[单项选择]Even researchers, for example, ______ applying the concept of "cohesion" may not produce the most cost-effective science.
A. appreciate for
B. appreciate that
C. appreciate as to
D. appreciate as

[单项选择]Besides applying for breathing space from creditors, managers in American firms can also ______.

[单项选择]Researchers at the University of Illinois determined that the ______ of a father can help improve a child's grades.
A. involvement
B. communication
C. interaction
D. association

[单项选择]Alternatively, researchers seeking access to identifiable, records or specimens can use "expedited" IRB review, in which one board member is ______ to rapidly approve such studies.
A. controlled
B. enrolled
C. enlisted
D. authorized

[单项选择]Researchers have studied the connection between aspirin and heart disease for _______.


A. more than a century
B. more than ten years
C. more than one year
D. a few years

[单项选择]American researchers found that the language clock could help ______.
A. count the exact time by years
B. decide when the language came into being
C. make sure when the Aleuts left the mainland
D. determine how the time changed

[单项选择]Researchers discovered that plants infected with a virus give off a gas that ______ disease resistance in neighboring plants.
A. contracts
B. activates
C. maintains
D. prescribes

[单项选择]The main purpose of these researchers is


A. to help to destroy old cells and boost new ones.
B. to alter the natural process known as apoptosis.
C. to compare different levels of proteins.
D. to find out ways to protect aging brain cells.

[单项选择]What is the nationality of the researchers


A. French.
B. Spanish.
C. German.
D. Russian.

[单项选择]

British cancer researchers have found that childhood leukaemia is caused by an infection and clusters of cases around industrial sites are the result of population mixing that increases exposure. The research published in the British Journal of Cancer backs up a 1988 theory that some as yet unidentified infection caused leukaemia--not the environmental factors widely blamed for the disease.
"Childhood leukaemia appears to be an unusual result of a common infection," said Sir Richard Doll, an internationally-known cancer expert who first linked tobacco with lung cancer in 1950. "A virus is the most likely explanation. You would get an increased risk of it if you suddenly put a lot of people from large towns in a rural area, where you might have people who had not been exposed to the infection." Doll was commenting on the new findings by researchers at Newcastle University, which focused on a cluster of leukaemia cases around the Sellafield nuclear repro
A. medical journal
B. research institute
C. private company
D. governmental agency