下列说法正确的是( ) A.核反应堆是人工控制链式反应的装置 B.,式中d=3 C

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问题:

下列说法正确的是(   )
A.核反应堆是人工控制链式反应的装置

B.,式中d=3

C.β衰变中产生的β射线是原子核外电子挣脱原子核束缚后形成的

D.4个放射性元素的原子核经过一个半衰期后一定还剩下2个没有发生衰变

考点:β衰变半衰期核反应重核裂变
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关于Meta分析下列哪项是不正确的()

A、一种对多个具有相同研究目的且互相独立的研究结果进行系统、综合分析的方法

B、荟萃分析

C、综合分析

D、定性分析

E、更全面、更可靠地评价一种疗法,得出有效、无效或需要进一步研究结论的方法

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取用量为“约”若干是指取用量不得超过规定量的()

A.十分之一

B.百分之一

C.千分之一

D.万分之一

E.±10%

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传统的上颌窦根治术与鼻内镜手术比较其最大的缺点是()。

A.手术操作复杂,难度大

B.面部肿胀

C.面部和牙齿麻木

D.上颌窦结构和功能损伤严重

E.手术出血较多

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劳动卫生法规是

A.生产过程管理条例
B.降低生产成本的依据
C.保障工人安全生产的管理依据
D.安全劳动的规范
E.日常行为准则

题型:选择题

Culture is activity of thought, and receptiveness to beauty and human feeling. (1) of information have nothing to do with it. A merely well-informed man is the most useless (2) on God’s earth. What we should (3) at producing is men who (4) both culture and expert knowledge in some special direction. Their expert knowledge will give them the ground to start (5) , and their culture will lead them as (6) as philosophy and as high as (7) We have to remember that the valuable (8) development is self-development, and that it (9) takes place between the ages of sixteen and thirty. As to training, the most important part is given by mothers before the age of twelve.

In training a child to activity of thought, above all things we must (10) of what I will call "inert ideas"—— that is to say, ideas that are merely (11) into the mind without being (12) , or tested, or thrown into fresh combinations.

In the history of education, the most (13) phenomenon is that schools of learning, which at one epoch are alive with a craze for genius, in a (14) generation exhibit merely pedantry and routine. The reason is that they are overlade with inert ideas. Except at (15) intervals of intellectual motivation, education in the past has been radically (16) with inert ideas. That is the reason why (17) clever women, who have seen much of the world, are in middle life so much the most cultured part of the community. They have been saved from this horrible (18) of inert ideas. Every intellectual revolution which has ever stirred humanity (19) greatness has been a (20) protest against inert ideas.

8()

A.rational

B.physiological

C.divine

D.intellectual

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