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【判断题】
液化石油气瓶的最大工作压力为1.8MPa。
A.
正确
B.
错误
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【单选题】It’s also fairly easy to _______, making it far more commercially viable than other methods of downsizing battery technology.
A.
rattle.
B.
fabricate.
C.
bleach.
D.
flush.
E.
beguile
【简答题】A.Larger family units and ineffective means of transportation. B.Outmoded methods of farming and ineffective means of transportation. C.A new dependence on people far away and the use of money. D.The ...
【单选题】欲分离酸水提取液中的生物碱()
A.
水溶醇沉法
B.
酸溶碱沉
C.
有机溶剂萃取法
D.
铅盐沉淀法
E.
结晶法
【简答题】There have been many advances in technology over the past years. These have revolutionized the way we communicate with people who are far away. Compare and contrast methods of communication used today...
【单选题】This is one of the methods used to try and ______ to the patients that alcohol, as far as they are concerned, should be a thing of the past.
A.
get by
B.
get through
C.
get over
D.
get across
【判断题】A martial art (武术) is one of the methods of fighting often without weapons(武器),coming from the Far East (遥远的东方),e.g. kungfu, karate (空手道) and judo (柔道 ).
A.
正确
B.
错误
【简答题】氨是一种重要的化工原料,某学习小组欲制取氨气并探究其性质。请回答 (1)实验室制取氨气的化学方程式是_____________________。 (2)①上图是进行氨气喷泉实验的装置,引发喷泉的操作步骤是_____________________。 ②氨气使烧杯中溶液由无色变为红色,其原因是 _______________________(用电离方程式表示)。(3)该小组同学设计了下图所示的实验装...
【简答题】(16分)氨是一种重要的化工原料,某学习小组欲制取氨气并探究其性质。请回答: (1)实验室制取氨气的化学方程式是 。 (2)①右图是进行氨气喷泉实验的装置,引发喷泉的操作步骤是 。 ②氨气使烧杯中溶液由无色变为红色,其原因是_______________________________(用电离方程式表示)。 (3)该小组同学设计了下图所示的实验装置(部分夹持仪器未画出),探究氨气的还原性并检验产物...
【简答题】互联网中,IP地址表示形式是彼此之间用圆点分隔的四个十进制数,每个十进制数的取值范围为0到( )
【单选题】IP数据报在经过路由器进行转发时不进行()
A.
首部校验
B.
路由选择
C.
数据分片
D.
数据校验
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