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【简答题】
在化学实验中，常常依据反应伴随的现象来确定反应是否发生．请按要求写出化学方程式． （1）反应中伴有发光、放热现象 ； （2）加热某种固体（或固体混合物），反应后固体质量减小 ； （3）根据下表写出有沉淀生成的复分解反应 ． NO 3 ﹣ SO 4 2 ﹣ OH ﹣ K + 溶 溶 溶 Na + 溶 溶 溶 Cu 2+ 溶 溶 不溶
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举一反三
【单选题】Nowadays, with increasing numbers of people living in cities, we _as a result__ eat more meat.( as a result)
A.
结果
B.
参加
C.
醒来
【单选题】__As a result___, we are using more land and resources to actually produce less food.( As a result)
A.
建立
B.
掌握
C.
结果是
【单选题】It’s raining heavily. _________, we have to stay at home.
A.
As a result of
B.
As the result
C.
As a result
D.
As the result of
【简答题】As a result, we have to water the vegetable garden.
【单选题】As a reliable travel agency, we really do try to describe our centers and accommodation as realistically as possible. All our Super Centers and Main Centers have been extensively investigated during t...
A.
the year before last
B.
three years ago
C.
between 1975 and 1976
D.
within the last three seasons
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