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【简答题】某化学课外小组欲用固体与液体反应(不需加热),快速简便制取一瓶(125mL)干燥的氧气. (1)从所提供的仪器(或装置)A-G中选出所需要的是(填序号)________. (2)选用的药品为________,化学反应方程式为________. (3)除导管和胶管外,还需要的仪器和用品为________. (4)用上述所选的气体发生装置,除了可制取 外,请写出用此装置制取的两种其它气体及制取气体所需...
【简答题】STM32 的 GPIO 的配置模式有那几种?
【简答题】STM32 的 GPIO 的配置模式有那几种?请举例说明如何进行配置模式的配置?
【单选题】—Will you come for the meeting? —Yes, of course, if you think ______.
A.
I come
B.
I go
C.
I should
【单选题】I Know Just How You Feel Do you feel sad? Happy? Angry? You may think that the way you show these emotions is unique. Well, think again. Even the expression of the most personal feelings can be classi...
A.
We thought of trying to describe each emotion, but it would have been almost impossible to make clear rules for this.
B.
These particular muscles are difficult to control, and few people can do it.
C.
Research has also been done to find out which areas of the brain read emotional expressions.
D.
They decided that it was a mental state that could be preceded by 'I feel' or 'he looks' or 'she sounds'.
E.
He said that the expression of these feelings was universal and recognisable by anyone, from any culture.
F.
Any other method of showing all the 412 emotions, such as words, would have been far less effective. (46)
【简答题】某中学化学课外活动小组欲探究铁在氯气中燃烧产物的成份、性质和用途，设计了如下实验步骤： Ⅰ．用下列实验装置制取纯净干燥的氯气 写出A、B中所盛放最佳化学试剂的名称______、______，画出虚线框内所需装置图并标明所需试剂的名称______． Ⅱ．某同学将一定量铁粉与Cl 2 恰好完全反应得到一固体物质a，然后通过实验确定其成分．探究过程如下： （1）提出假设：（请把下列假设补充完整） 假设①...
【简答题】某化学课外小组欲用固体与液体反应（不需加热），快速简便制取一满瓶（125mL）干燥的氧气。 （1）从A～G中所提供的仪器（或装置），选出所需要的（填序号） ；除导管及胶管外，还需要的仪器用品有 。选用的试剂为 。 （2）用上述所选的气体发生装置，除可制取O 2 、H 2 、CO 2 外，请写出还可用此装置制取的两种其它气体与制取该气体所需的试剂。
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