皮皮学，免费搜题
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搜题
【单选题】
基因组中一些结构相似、功能相关、来源相同的基因成簇地排列在一起，这些基因可同时表达，也可在不同发育阶段表达，称为
A.
单一基因
B.
基因家族
C.
假基因
D.
串联重复基因
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【简答题】如图，AB ∥ A′B′，BC ∥ B′C′，BC交A′B′于点D，∠B与∠B′有什么关系？为什么？
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【单选题】According to the interview, Professor Smith indicates that
A.
people are reluctant to talk about privacy publicly in the 1920s.
B.
American women were given more rights and choices in the 1920s.
C.
many women were forced to join the army during the 1920s.
D.
the number of students attending high school decreased in the 1920s.
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【单选题】无零点二阶系统的闭环特征方程为 , 阶跃信号作用下的过渡过程 ( )
A.
不存在超调
B.
存在超调
C.
不稳定
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【单选题】已知：如图，梯形ABCD中，AD ∥ BC，AB=a，AD=b，∠A=2∠C，则BC长为（　　）
A.
a+ b 2
B.
a 2 +b
C.
a+b
D.
a+2b
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【判断题】People are reluctant to take unnecessary meetings.
A.
正确
B.
错误
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【单选题】先导式溢流阀开启时，远程控制口的压力 进油口的压力。
A.
大于
B.
等于
C.
小于
D.
小于或等于
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【多选题】设a，b为不共线的非零向量， AB =2a+3b ， BC =-8a-2b ， CD =-6a-4b ，那么（　　）
A.
AD 与 BC 同向，且 | AD ＞| BC |
B.
AD 与 BC 同向，且 | AD |＜| BC |
C.
AD 与 BC 反向，且 | AD |＞| BC |
D.
AD 与 BC 反向，且 | AD |＜| BC |
查看完整题目与答案
【判断题】由于脐带绕颈、生产过程中胎盘早剥,羊水栓塞,生后发生窒息、中毒、护理不当所造成的脑瘫为先天因素.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Some people are reluctant to hear 'an animal is unhappy' for the reason that______.
A.
they usually prefer positive emotions to negative ones
B.
the emotions animals have are usually happy rather than sad
C.
animals experience more happy emotions than unhappy ones
D.
they refuse to stop using animals for the benefit of their own
查看完整题目与答案
【单选题】Most surveys find that people are reluctant to place themselves at either the top or the bottom of the social ladder.
A.
uncommon
B.
uncertain
C.
unwilling
D.
voluntary
查看完整题目与答案
相关题目：
【简答题】如图，AB ∥ A′B′，BC ∥ B′C′，BC交A′B′于点D，∠B与∠B′有什么关系？为什么？
查看完整题目与答案
【单选题】According to the interview, Professor Smith indicates that
A.
people are reluctant to talk about privacy publicly in the 1920s.
B.
American women were given more rights and choices in the 1920s.
C.
many women were forced to join the army during the 1920s.
D.
the number of students attending high school decreased in the 1920s.
查看完整题目与答案
【单选题】无零点二阶系统的闭环特征方程为 , 阶跃信号作用下的过渡过程 ( )
A.
不存在超调
B.
存在超调
C.
不稳定
查看完整题目与答案
【单选题】已知：如图，梯形ABCD中，AD ∥ BC，AB=a，AD=b，∠A=2∠C，则BC长为（　　）
A.
a+ b 2
B.
a 2 +b
C.
a+b
D.
a+2b
查看完整题目与答案
【判断题】People are reluctant to take unnecessary meetings.
A.
正确
B.
错误
查看完整题目与答案
【单选题】先导式溢流阀开启时，远程控制口的压力 进油口的压力。
A.
大于
B.
等于
C.
小于
D.
小于或等于
查看完整题目与答案
【多选题】设a，b为不共线的非零向量， AB =2a+3b ， BC =-8a-2b ， CD =-6a-4b ，那么（　　）
A.
AD 与 BC 同向，且 | AD ＞| BC |
B.
AD 与 BC 同向，且 | AD |＜| BC |
C.
AD 与 BC 反向，且 | AD |＞| BC |
D.
AD 与 BC 反向，且 | AD |＜| BC |
查看完整题目与答案
【判断题】由于脐带绕颈、生产过程中胎盘早剥,羊水栓塞,生后发生窒息、中毒、护理不当所造成的脑瘫为先天因素.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Some people are reluctant to hear 'an animal is unhappy' for the reason that______.
A.
they usually prefer positive emotions to negative ones
B.
the emotions animals have are usually happy rather than sad
C.
animals experience more happy emotions than unhappy ones
D.
they refuse to stop using animals for the benefit of their own
查看完整题目与答案
【单选题】Most surveys find that people are reluctant to place themselves at either the top or the bottom of the social ladder.
A.
uncommon
B.
uncertain
C.
unwilling
D.
voluntary
查看完整题目与答案