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【简答题】
焊接的连接形式按构件的相对位置分为( )、( )、( )和( ) 连接
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【单选题】An experiment analyzes factors involved in the cell cycle during growth factor-induced cellular regeneration in a tissue culture. Cyclin B synthesis is induced; the cyclin B then binds and activates c...
A.
G0 to G1
B.
G1 to S
C.
S to G2
D.
G2 to M
E.
M to G1
【多选题】Cloze
A.
by
B.
simply
C.
alone
D.
made
E.
In some cases
F.
voices
G.
response
H.
duration
I.
lasting
J.
range K. reproduced L. kind M. sounds N. within O. However The warming of the Earth observed over the last 100 years is due to a combination of many factors. Warming due to the increase in greenhouse gases _______ (1) has been the determining factor so far. _______ (2), projections of greenhouse warming do not rest on recent observations; they come from scientific understanding of the climate system. A _______ (3) of simple and complex computer models has been used over the last 30 years to put together knowledge of many climate processes. Contrary to some scientific opinion, current models do a reasonable job of simulating today’s climate. The difference between summer and winter temperatures, in _______ (4) to change in heating from the Sun, is correctly simulated to _______ (5) about 0.5 degrees over much of the planet. Natural events provide additional tests of our understanding. For example, the scale and _______ (6) of cooling due to the eruption of Mt. Pinatubo were _______ (7) by climate models. When greenhouse gases are increased in climate models, the response is always an increase in average temperatures and water vapor. Models vary in their results but, in virtually all cases, doubling the amount of carbon dioxide increases global average temperatures _______ (8) between 1.5 Celsius Degrees and 4 Celsius Degrees. Why are there some dissenting _______ (9) heard on the science of climate change? _______ (10) it appears that critics are simply unaware of the depth of the science developed so far. Others are concerned because we do not understand everything about the climate system.
【简答题】α -Fe 、γ -Fe 、 Mg 属于体心立方晶格的是 ,属于面心立方晶格的是 ,属于密排六方晶格的是 。
【单选题】关于管道安装定额的套用,下列说法错误的是( )。
A.
水、采暖管道与市政管道界限以水表井为界，无水表井者，以与市政管道碰头点为界 ；
B.
给水管道安装项目中，均包括水压试验及水冲洗工作内容，如需消毒，执行本册第八章的相应项目 ；
C.
消火栓管道安装执行第十册《给排水、采暖、燃气工程》的相应定额；
D.
水灭火系统 钢管（法兰连接）定额中包括管件及法兰安装，但管件、法兰数量应按设计图纸用量另行计算 。
【多选题】有效使用电子邮件的要点包括:
A.
电子邮件的主题应该吸引读者兴趣并显示文章内容
B.
每封邮件只包含一条信息
C.
在正文中点明关键信息，这样可以降低读者忽略或删除重要信息的风险。
D.
当信息很长时运用附件
【简答题】合金是指两种或两种以上的金属元素或金属元素与 元素组成的具有 特性的物质。
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