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【简答题】
已知A、B、C、D、E、F、G、H、I九种物质,A、B、D、E焰色反应均为紫色(透过蓝色钴玻璃),G是一种单质,I是一种化合物,H是一种淡黄色固体,它们的转化关系如图所示.请回答下列问题: (1)B、D、I的化学式是B______   D______    I______ (2)写出H的一种用途______ (3)写出A受热分解的化学方程式______ (4)若H与C反应固体增重4.2g,则参加反应的C气体在标准状况下的体积为______ L.
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举一反三
【单选题】( )控制发生的实际变化过程之中。
A.
前馈
B.
反馈
C.
同期
D.
预防
【单选题】Would you mind joining for the picnic tomorrow? ().
A.
So sorry. Next time we'll go. Thanks anyway.
B.
OK, thank you.
C.
No, thanks.
【单选题】听力原文: The next house we'll be looking at is in a quiet area of town. It's only 5 years old. It has 2 stories, 3 bedrooms, and an enormous backyard. The previous owner was a landscaper, so the house an...
A.
An actor
B.
A landscaper
C.
An architect
D.
A photographer
【简答题】工厂所需电力容量不大于160KVA.时,通常采用()进线,直接由当地的公用电网供电,>160KVA.且<1000KVA.采用()进线,>1000KVA.时采用()进线。
【单选题】药浴一般在剪毛后10d~15d进行
A.
1-5d
B.
7d-10d
C.
10-15d
D.
20-30d
【单选题】下列关于企业合并实施一般性税务处理的说法,正确的是( )。
A.
被合并企业的亏损可按比例在合并企业结转弥补
B.
合并企业应按照账面净值确认被合并企业各项资产的计税基础
C.
被合并企业股东应按清算进行所得税处理
D.
合并企业应按照协商价格确认被合并企业各项负债的计税基础
【单选题】- Next week we'll have the final English exam. - Yes? Then, every minute must be made full use ________ English. [     ]
A.
of studying
B.
to study
C.
of being studying
D.
of to study
【单选题】工厂所需电力容量不大于160KVA时,通常采用( )进线,直接由当地的公用电网供电。
A.
架空线路
B.
电缆或架空线路
C.
电缆
D.
埋地光缆
【单选题】控制发生的实际变化过程之中:
A.
前馈
B.
后馈
C.
同步
D.
预防
【单选题】In the next century we'll be able to alter our DNA radically, encoding our visions and vanities while concocting new life-forms. When Dr. Frankenstein made his monster, he wrestled with the moral issu...
A.
to give an episode of the DNA technological breakthroughs.
B.
to highlight the importance of a means to some everlasting ends.
C.
to show how he created a new form. of life a thousand years ago.
D.
to introduce the topic of moral philosophies incurred in biotechnology.
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