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【单选题】
红色鼠尾草和白色鼠尾草杂交，F1为紫色植株，F2得314株紫色、117株红色、148株白色，若F2中的红色植株互相授粉，则后代表型及比应为（ ）。
A.
9紫∶3红∶4白
B.
2紫∶6红∶1白
C.
3红∶1白
D.
8红∶1白
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参考答案：
举一反三
【单选题】A new plan for getting children to and from school is being started by the education authorities (当局) in part of Eastern England. This could end the worries of many parents fearful for their children'...
A.
whose parents were worried about them
B.
who would have had to walk otherwise
C.
who could not walk
D.
who had to travel a long way
查看完整题目与答案
【简答题】《中华人民共和国建筑法》规定，工程监理单位与被监理工程的（ ）不得有隶属关系或者其他利害关系。
查看完整题目与答案
【单选题】在测定金属丝杨氏模量的实验中,通常预加一定重量的负荷,目的是
A.
消除摩擦力
B.
没有目的
C.
拉直金属丝，避免将拉直过程当为伸长过程进行测量
D.
减少初读数，消除零误差
查看完整题目与答案
【单选题】听力原文：Email captures the essence of life at the close of the 20th century with an authority that few other products of digital technology can claim. Email, ultimately, is a fragile thing, easy to forge...
A.
Email shows more authority than other products of digital technology.
B.
Email is as fragile a thing as it is convenient to its users.
C.
Email can keep as many as 1,500 saved messages.
D.
Email may help strengthen your own memory.
查看完整题目与答案
【单选题】在用拉伸法测定金属丝的杨氏模量实验中,通常需在钢丝上预加10kg负荷,目的是
A.
拉直金属丝，避免将拉直过程当为伸长量进行测量
B.
减小初读数，消除零误差
C.
消除摩擦力的影响
D.
使系统稳定，金属丝铅直
查看完整题目与答案
【判断题】在一定时期内经营最成功的企业,一般是能够适应其相关环境的企业
A.
正确
B.
错误
查看完整题目与答案
【单选题】Look at the first paragraph. Who were right: The authorities or the pessimists?
A.
The authorities.
B.
The pessimists.
C.
Both.
D.
Neither.
查看完整题目与答案
【判断题】在两种介质分界面发生全反射时,电磁波能量不能继续进入另一介质内部
A.
正确
B.
错误
查看完整题目与答案
【多选题】实施货币政策调节经济的手段有()
A.
利率
B.
税率
C.
再贴现率
D.
公开市场业务
查看完整题目与答案
【单选题】By 'wives lose their functions as producers and maintainers of the labor force', the author means that______.
A.
many women are no longer able to join the labor force
B.
many women become too weak to work
C.
many women refuse to have children
D.
the major job for women is no longer to give birth to and bring up children
查看完整题目与答案
相关题目：
【单选题】A new plan for getting children to and from school is being started by the education authorities (当局) in part of Eastern England. This could end the worries of many parents fearful for their children'...
A.
whose parents were worried about them
B.
who would have had to walk otherwise
C.
who could not walk
D.
who had to travel a long way
查看完整题目与答案
【简答题】《中华人民共和国建筑法》规定，工程监理单位与被监理工程的（ ）不得有隶属关系或者其他利害关系。
查看完整题目与答案
【单选题】在测定金属丝杨氏模量的实验中,通常预加一定重量的负荷,目的是
A.
消除摩擦力
B.
没有目的
C.
拉直金属丝，避免将拉直过程当为伸长过程进行测量
D.
减少初读数，消除零误差
查看完整题目与答案
【单选题】听力原文：Email captures the essence of life at the close of the 20th century with an authority that few other products of digital technology can claim. Email, ultimately, is a fragile thing, easy to forge...
A.
Email shows more authority than other products of digital technology.
B.
Email is as fragile a thing as it is convenient to its users.
C.
Email can keep as many as 1,500 saved messages.
D.
Email may help strengthen your own memory.
查看完整题目与答案
【单选题】在用拉伸法测定金属丝的杨氏模量实验中,通常需在钢丝上预加10kg负荷,目的是
A.
拉直金属丝，避免将拉直过程当为伸长量进行测量
B.
减小初读数，消除零误差
C.
消除摩擦力的影响
D.
使系统稳定，金属丝铅直
查看完整题目与答案
【判断题】在一定时期内经营最成功的企业,一般是能够适应其相关环境的企业
A.
正确
B.
错误
查看完整题目与答案
【单选题】Look at the first paragraph. Who were right: The authorities or the pessimists?
A.
The authorities.
B.
The pessimists.
C.
Both.
D.
Neither.
查看完整题目与答案
【判断题】在两种介质分界面发生全反射时,电磁波能量不能继续进入另一介质内部
A.
正确
B.
错误
查看完整题目与答案
【多选题】实施货币政策调节经济的手段有()
A.
利率
B.
税率
C.
再贴现率
D.
公开市场业务
查看完整题目与答案
【单选题】By 'wives lose their functions as producers and maintainers of the labor force', the author means that______.
A.
many women are no longer able to join the labor force
B.
many women become too weak to work
C.
many women refuse to have children
D.
the major job for women is no longer to give birth to and bring up children
查看完整题目与答案
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