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【单选题】
对细胞中某些物质的组成成分进行分析，可以作为鉴别真核生物不同个体是否为同一物种的辅助手段，一般不采用的物质是
A.
蛋白质
B.
DNA
C.
RNA
D.
核苷酸
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举报参考答案：
B
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举一反三
Why is the man against health clubs?
A.
Because many club members lose their money as clubs fail.
B.
Because many club members soon gain the weight again.
C.
Because they are very expensive.
What is the probable reason of being fat according to the man?
A.
Body chemistry.
B.
Lack of will power.
C.
Bad habits.
Why did Teddy thank Mrs. Thompson at his wedding?
A.
She had kept in touch with him.
B.
She had given him encouragement.
C.
She had sent him Christmas presents.
D.
She had taught him how to judge people.
Jim is the only one of the policemen in his office who __________ the award.
A.
have won
B.
win
C.
has won
D.
was to win
The company the girl used to work ________ was shut down last month.
A.
for which
B.
for
C.
for whom
D.
/
相关题目：
Why is the man against health clubs?
A.
Because many club members lose their money as clubs fail.
B.
Because many club members soon gain the weight again.
C.
Because they are very expensive.
What is the probable reason of being fat according to the man?
A.
Body chemistry.
B.
Lack of will power.
C.
Bad habits.
Why did Teddy thank Mrs. Thompson at his wedding?
A.
She had kept in touch with him.
B.
She had given him encouragement.
C.
She had sent him Christmas presents.
D.
She had taught him how to judge people.
Jim is the only one of the policemen in his office who __________ the award.
A.
have won
B.
win
C.
has won
D.
was to win
The company the girl used to work ________ was shut down last month.
A.
for which
B.
for
C.
for whom
D.
/
参考解析：
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