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【单选题】
测定某试样中 As 2 O 3 的含量时,先将试样分解并将其所含的砷全部沉淀为 Ag 3 AsO 4 ,然 后又把 Ag 3 AsO 4 完全转化为 AgCl 沉淀,经过滤,洗涤,烘干后,对所得到的 AgCl 沉淀进 行称量,若以 AgCl 的量换算为试样中 As 2 O 3 的含量,则换算因数为 ( )
A.
M （ As 2 O 3 ） /M （ AgCl ）
B.
M （ As 2 O 3 ） /6M （ AgCl ）
C.
6M （ As 2 O 3 ） /M （ AgCl ）
D.
M （ As 2 O 3 ） /3M （ AgCl ）
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参考答案：
举一反三
【单选题】According to the conversation which statement about the name of the White House is True?
A.
It became official before President Theodore Roosevelt had it engraved upon his stationery.
B.
It derives the name from the color of the building.
C.
The building was restored after being burned in 1814, so the smoke - stained gray stone walls were painted white.
D.
Actually the cognomen 'White House' was applied to the building some time before it was painte
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【单选题】-- Have you moved into the new house? -- Not yet. The rooms _______.
A.
are painting
B.
are being painted
C.
are painted
D.
are being painting
查看完整题目与答案
【多选题】以下软件中是矢量绘图软件的有( )。
A.
Photoshop
B.
Illustrator
C.
CorelDRAW
D.
Painte
查看完整题目与答案
【单选题】液压系统工作时的环境温度较高时,宜选用 ( )
A.
粘度较大的液压油；
B.
粘度较小的液压油；
C.
粘度大或小的液压油都可选用；
D.
无法确定。
查看完整题目与答案
【单选题】Your door needs ___________ . Would you like me to do it for you?
A.
to paint
B.
painting
C.
paint
D.
painted
查看完整题目与答案
【单选题】Before__________white, the door should be cleaned thoroughly. [     ]
A.
painting
B.
paint
C.
being painted
D.
having been painted
查看完整题目与答案
【单选题】一 Have you moved to your new house? 一 Not yet. My house _____. [     ]
A.
is painting
B.
has been painted
C.
is painted
D.
is being painted
查看完整题目与答案
【单选题】问题解决的过程大致可以划分为五个阶段,其中首先要做的是( )
A.
总结评价
B.
发现问题
C.
分析问题
D.
提出假设
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【单选题】—_____she come this afternoon? —No, she can't. Because her mother is ill. [     ]
A.
Can
B.
Would
C.
Could
D.
Will
查看完整题目与答案
【简答题】一般情况下,恒速段汽化的水分为( )。
查看完整题目与答案
相关题目：
【单选题】According to the conversation which statement about the name of the White House is True?
A.
It became official before President Theodore Roosevelt had it engraved upon his stationery.
B.
It derives the name from the color of the building.
C.
The building was restored after being burned in 1814, so the smoke - stained gray stone walls were painted white.
D.
Actually the cognomen 'White House' was applied to the building some time before it was painte
查看完整题目与答案
【单选题】-- Have you moved into the new house? -- Not yet. The rooms _______.
A.
are painting
B.
are being painted
C.
are painted
D.
are being painting
查看完整题目与答案
【多选题】以下软件中是矢量绘图软件的有( )。
A.
Photoshop
B.
Illustrator
C.
CorelDRAW
D.
Painte
查看完整题目与答案
【单选题】液压系统工作时的环境温度较高时,宜选用 ( )
A.
粘度较大的液压油；
B.
粘度较小的液压油；
C.
粘度大或小的液压油都可选用；
D.
无法确定。
查看完整题目与答案
【单选题】Your door needs ___________ . Would you like me to do it for you?
A.
to paint
B.
painting
C.
paint
D.
painted
查看完整题目与答案
【单选题】Before__________white, the door should be cleaned thoroughly. [     ]
A.
painting
B.
paint
C.
being painted
D.
having been painted
查看完整题目与答案
【单选题】一 Have you moved to your new house? 一 Not yet. My house _____. [     ]
A.
is painting
B.
has been painted
C.
is painted
D.
is being painted
查看完整题目与答案
【单选题】问题解决的过程大致可以划分为五个阶段,其中首先要做的是( )
A.
总结评价
B.
发现问题
C.
分析问题
D.
提出假设
查看完整题目与答案
【单选题】—_____she come this afternoon? —No, she can't. Because her mother is ill. [     ]
A.
Can
B.
Would
C.
Could
D.
Will
查看完整题目与答案
【简答题】一般情况下,恒速段汽化的水分为( )。
查看完整题目与答案
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