The ultimate purpose of Dr. Vink's research is to
A. identify all the genes that are responsible for smoking.
B. determine the real cause of nicotine dependence.
C. make a difference between social smokers and other smokers.
D. help different smokers give up smoking more effectively.
查看答案
The word "genome" (line 1, paragraph 4) most probably means
A. a particular human gene.
B. a DNA letter,
C. a bank of genes.
D. functional DNA letters.
根据我国《公司法》的规定，国有独资公司的监事会成员由国有资产监督管理机构委派，人数不少于5人，但是，由公司职工代表大会选举产生的职工代表的比例不得低于()。
A. 39818
B. 39817
C. 39816
D. 39815
We can infer from the last two paragraphs that
A. there is no easy money on the pavement for passers by to pick up.
B. Mr. Porter is very likely to fail in a trap set up by the economists.
C. competition alone is not enough to cure the health care system.
D. only government actions can sweep aside the obstacles along the way.
The major difference between Dr. Vink and other geneticists is that
A. her research is not based on the study of twins but on questionnaires.
B. her research does not emphasize the contrast between two kinds of twins.
C. her research is interested in the smoking habits of fraternal twins.
D. her research only focuses on the study of the DNA of adult twins.
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