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【单选题】
有关病毒核酸的描述哪项是错误的?
A.
其化学成分为DNA和RNA
B.
具有感染性
C.
是病毒增殖、遗传和变异的物质基础
D.
构成病毒体的核心
E.
化学成分是RNA或DNA
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参考答案：
举一反三
【单选题】Why did the company want to visit the exhibition?
A.
To well know the development and progress in science and technology home and abroad
B.
To learn about the history about the Second World War
C.
To see visitors' reaction to their production
D.
To find out the new method to do scientific and technological research
查看完整题目与答案
【单选题】The reason why Washington didn't visit France was probably that he ______
A.
did not really care about going
B.
did not know the French leaders
C.
could not communicate directly with the French leaders
D.
was too busy to travel
查看完整题目与答案
【单选题】Why did critics say the visit would not be good?
A.
the U.S. should apologize for the bombings
B.
the trip will be seen as a U.S. apology for the bombings
C.
people in Hiroshima are against Obama's visit
D.
Japan should apologize for the treatment of American prisoners
查看完整题目与答案
【判断题】目标代码生成时，应考虑如何充分利用计算机的寄存器的问题。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】What's the guest's room number ?
A.
454
B.
545
查看完整题目与答案
【判断题】目标代码生成时，不应考虑如何充分利用计算机的寄存器的问题。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】给水排水、暖通空调及电气专业施工图等,也可将给水排水、暖通空调及电气专业施工图合在一起称为设备施工图。
A.
正确
B.
错误
查看完整题目与答案
【简答题】用如图甲所示装置探究萘熔化时温度的变化规律。请回答下列问题： （1）将装有萘的试管放入水中加热，而不是用酒精灯直接对试管加热，这样做不但能使试管受热均匀，而且萘的温度上升速度较____________（选填“快”或“慢”），便于及时记录各个时刻的温度。 （2）除如图甲所示实验器材外，还需要的实验器材有火柴和___________。 （3）萘加热一段时间后，可看到烧杯中有“白气”冒出，“白气”是__...
查看完整题目与答案
【单选题】Why did the doctors come to visit Herpin?
A.
They hoped to cure him of his sleeplessness.
B.
They hoped to find whether it was true that he never slept.
C.
They hoped to find out why some old people didn't need any sleep.
D.
They hoped to find a way to free people from the need for sleep.
查看完整题目与答案
【简答题】What's the guest's name? He is ____________ _____________.
查看完整题目与答案
相关题目：
【单选题】Why did the company want to visit the exhibition?
A.
To well know the development and progress in science and technology home and abroad
B.
To learn about the history about the Second World War
C.
To see visitors' reaction to their production
D.
To find out the new method to do scientific and technological research
查看完整题目与答案
【单选题】The reason why Washington didn't visit France was probably that he ______
A.
did not really care about going
B.
did not know the French leaders
C.
could not communicate directly with the French leaders
D.
was too busy to travel
查看完整题目与答案
【单选题】Why did critics say the visit would not be good?
A.
the U.S. should apologize for the bombings
B.
the trip will be seen as a U.S. apology for the bombings
C.
people in Hiroshima are against Obama's visit
D.
Japan should apologize for the treatment of American prisoners
查看完整题目与答案
【判断题】目标代码生成时，应考虑如何充分利用计算机的寄存器的问题。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】What's the guest's room number ?
A.
454
B.
545
查看完整题目与答案
【判断题】目标代码生成时，不应考虑如何充分利用计算机的寄存器的问题。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】给水排水、暖通空调及电气专业施工图等,也可将给水排水、暖通空调及电气专业施工图合在一起称为设备施工图。
A.
正确
B.
错误
查看完整题目与答案
【简答题】用如图甲所示装置探究萘熔化时温度的变化规律。请回答下列问题： （1）将装有萘的试管放入水中加热，而不是用酒精灯直接对试管加热，这样做不但能使试管受热均匀，而且萘的温度上升速度较____________（选填“快”或“慢”），便于及时记录各个时刻的温度。 （2）除如图甲所示实验器材外，还需要的实验器材有火柴和___________。 （3）萘加热一段时间后，可看到烧杯中有“白气”冒出，“白气”是__...
查看完整题目与答案
【单选题】Why did the doctors come to visit Herpin?
A.
They hoped to cure him of his sleeplessness.
B.
They hoped to find whether it was true that he never slept.
C.
They hoped to find out why some old people didn't need any sleep.
D.
They hoped to find a way to free people from the need for sleep.
查看完整题目与答案
【简答题】What's the guest's name? He is ____________ _____________.
查看完整题目与答案
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