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【简答题】
玉米是我市重要的粮食作物之一，玉米幼苗有的是绿色的正常苗，有的是叶片发白的。由于缺乏叶绿素而不能进行光合作用，会过早死亡。请分析回答下列问题： (1)玉米被称为“黄金作物”，富含淀粉、脂肪、胡萝卜等营养物质，这些营养物质储存于玉米种子的___________中。 (2)玉米的是不利变异，引起这种变异的原因是____________________。 (3)玉米能产生叶绿素是由于它拥有显性基因B，而是隐性基因b则令玉米丧失产生叶绿素的能力。则的基因组成是__________。 (4)科研人员将两株玉米杂交后，再收集种子种植。在935粒成功萌芽的种子中，有705粒发育成绿色幼苗，余下的幼苗为。请写出这些绿色幼苗的基因组成______________。
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参考答案：
举一反三
【单选题】Which answer choice is a section title?
A.
Washington Post
B.
Seals Need The Ice
C.
The receding sea ice near Japan is affecting the local seals.
D.
Melting sea ice off northern Japan is blessing and curse for seals
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【单选题】Which answer choice is a section title?
A.
Third-grader who was born without hands has won a handwriting award
B.
Sara Hinesley is 10 years old.
C.
Sara Believes She Can Do Anything
D.
Sara will get her award on June 13.
查看完整题目与答案
【简答题】网络管理的五大功能分别是______、故障管理、计费管理、性能管理和安全管理。
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【判断题】If you have any doubts about any particular words, check its audio pronunciation in an online dictionary.( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which answer choice represents the LARGEST percentage, by weight, of an E. coli cell?
A.
RNA
B.
DNA
C.
protein
D.
lipids
E.
water
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【简答题】在网络管理的五大要素中，性能管理包括监视和______两大功能。
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【单选题】Which answer choice is a section title?
A.
"Would you pay $1,000 to see Komodo dragons on an island?"
B.
By The Washington Post, adapted by Newsela staff
C.
Their bite is often deadly.
D.
"Keeping Everyone Happy"
查看完整题目与答案
【单选题】Many experts have raised doubts about ____ it is right to judge teachers' performance on students' test scores. [     ]
A.
that
B.
what
C.
whether
D.
if
查看完整题目与答案
【单选题】Which answer choice is a section title?
A.
Third-grader who was born without hands has won a handwriting award
B.
Sara Hinesley is 10 years old.
C.
Sara Believes She Can Do Anything
D.
Sara will get her award on June 13.
查看完整题目与答案
【单选题】Which answer choice accurately characterizes James B. Comey's reaction to the FBI data?
A.
He realized that hate crimes result in a loss of trust, dignity and sometimes life.
B.
He realized the FBI needs to improve how it tracks and reports hate crimes.
C.
He decided to form a plan for how to stop hate crimes in the U.S.
D.
He decided to collect more information about last year's hate crime offenders.
查看完整题目与答案
相关题目：
【单选题】Which answer choice is a section title?
A.
Washington Post
B.
Seals Need The Ice
C.
The receding sea ice near Japan is affecting the local seals.
D.
Melting sea ice off northern Japan is blessing and curse for seals
查看完整题目与答案
【单选题】Which answer choice is a section title?
A.
Third-grader who was born without hands has won a handwriting award
B.
Sara Hinesley is 10 years old.
C.
Sara Believes She Can Do Anything
D.
Sara will get her award on June 13.
查看完整题目与答案
【简答题】网络管理的五大功能分别是______、故障管理、计费管理、性能管理和安全管理。
查看完整题目与答案
【判断题】If you have any doubts about any particular words, check its audio pronunciation in an online dictionary.( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which answer choice represents the LARGEST percentage, by weight, of an E. coli cell?
A.
RNA
B.
DNA
C.
protein
D.
lipids
E.
water
查看完整题目与答案
【简答题】在网络管理的五大要素中，性能管理包括监视和______两大功能。
查看完整题目与答案
【单选题】Which answer choice is a section title?
A.
"Would you pay $1,000 to see Komodo dragons on an island?"
B.
By The Washington Post, adapted by Newsela staff
C.
Their bite is often deadly.
D.
"Keeping Everyone Happy"
查看完整题目与答案
【单选题】Many experts have raised doubts about ____ it is right to judge teachers' performance on students' test scores. [     ]
A.
that
B.
what
C.
whether
D.
if
查看完整题目与答案
【单选题】Which answer choice is a section title?
A.
Third-grader who was born without hands has won a handwriting award
B.
Sara Hinesley is 10 years old.
C.
Sara Believes She Can Do Anything
D.
Sara will get her award on June 13.
查看完整题目与答案
【单选题】Which answer choice accurately characterizes James B. Comey's reaction to the FBI data?
A.
He realized that hate crimes result in a loss of trust, dignity and sometimes life.
B.
He realized the FBI needs to improve how it tracks and reports hate crimes.
C.
He decided to form a plan for how to stop hate crimes in the U.S.
D.
He decided to collect more information about last year's hate crime offenders.
查看完整题目与答案
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