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【简答题】
实验室利用如图所示装置进行相关实验，请回答下列问题： （1）①②中属于加热仪器的是______（填名称）．从A-F装置中有一个装置是错误的，改进方法是______． （2）若用高锰酸钾制取氧气，用的发生装置是______（填字母）；实验结束后，某同学发现水槽中的水变成了浅紫红色，从实验操作角度分析其原因是______；若用B和C装置制取氧气，B中发生反应的化学方程式：______． （3）若要制取二氧化碳，选用的块状固体药品为______；若用F装置检验二氧化碳，其中装入适量的______，出现______现象时，证明有二氧化碳产生． （4）若要制取氢气，可以使用D或E装置收集的原因是______；若选用F装置代替D装置收集氢气，气体应从______（填“长”或“短”）导管口通入．
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举一反三
【单选题】IV. Choose the word or phrase that can replace the underlined part in each sentence without changing its original meaning. 1. They sent out more than 30 invitations to the seminar, but only twenty peo...
A.
turned up
B.
took part in
C.
attended
D.
accepted
【单选题】In King Lear , why does Cordelia refuse to flatter his father?
A.
She does not want to stay in England.
B.
She refuses to use love to trade land.
C.
She is in love with the King of France.
D.
She is unable to do that.
【单选题】IV. Choose the word or phrase that can replace the underlined part in each sentence without changing its original meaning. He had drunk too much, and his body swayed as he walked.
A.
swung
B.
bent
C.
trembled
D.
stiffened
【单选题】In King Lear , Edmund creates a fake letter to his father in order to ( ).
A.
To kill his brother.
B.
To become the king of England.
C.
To win Goneril’s love
【简答题】关于物质的量的描述正确的是（ ） A．物质的量常用符号N表示 B．摩尔是7个基本物理量之一 C．1mol硫酸中约含有6.02×10 23 个硫原子 D．像米粒这样细小的物体可以方便地用摩尔进行计量
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