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【简答题】
下图表示初中化学里常见物质之间的转化关系(部分生成物未全部标出)，A、B为常见的气体，C为常见液体，C、植物光合作用必需的物质，甲是常用建筑材料，丙和戊均为黑色固体，己为光亮的红色固体，F是一种具有刺激性气味的气体，其水溶液呈碱性。 (1)写出甲、C、F的化学式：甲_______；C_______；F__________； (2) 写出E和乙反应的化学方程式________________________； (3)在上面框图变化中，四种基本反应类型里没有出现过_______反应。 (4)某兴趣小组利用戊反应在实验室制取物质己，根据所得的物质己的质量，求得参加反应的物质丁的质量，但实际消耗的物质丁的质量远远超过计算值，其原因可能是(从实验过程分析，任意答两点)__________________________________________________。
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举一反三
【简答题】adv. in an implied way
【简答题】基本RS触发器的两个输入端应避免()
【单选题】If you want to persuade a skeptical audience, which of the following is the most important for you to do in your speech?
A.
Define unclear terms in the introduction
B.
Focus the speech on questions of value
C.
Answer the reasons for the audience's skepticism
D.
Include a call for action in the conclusion
【简答题】adv. with a lot of force; in a way that is difficult to control
【单选题】I think Internet is ___________ than books.
A.
important
B.
importanter
C.
much important
D.
much more important
【简答题】f______ adv. in a loyal way; in a way that you can rely on.
【单选题】Which of the following is NOT true according to the passage?
A.
Invisible trade is not important.
B.
Developed countries enjoy favorable conditions in foreign trade.
C.
Goods from developed countries fetch higher prices in international markets.
D.
Columbia and Brazil have just the right climate for growing coffee.
【简答题】in a way that a person or group is generally believed to behave (adv.)
【单选题】Listening is just as ______ as speaking in language learning.
A.
important
B.
more important
C.
most important
D.
the most important
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