皮皮学，免费搜题
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比较、分析、归纳是学习化学的有效方法。现有以下反应： ①Zn+CuCl 2 =ZnCl 2 +Cu ；    ②Cu+2AgNO 3 =Cu(NO 3 ) 2 +Ag ； ③Cl 2 +2NaBr=2NaCl+Br 2 ；  ④I 2 +Na 2 S=2NaI=S ；   ⑤Br 2 +2KI=2KBr+I 2 （1）通过比较、分析，可以发现上述反应均属于基本反应类型中的 ____ 反应。在分析者五个反应前后个元素的化合价，我们发现了一个相似之处 。 （2）通过分析①和②，可以得出锌、银、铜三种金属的活动性顺序是 。 （3）非金属单质也有类似的反应规律，分析③、④和⑤可以判断S 、Cl 2 、I 2 、Br 2 的活动性由强到弱的顺序为 ，据此还可以判断下列反应不可能发生的是 _ 。 A、Cl 2 +2NaI=2NaCl+I 2 B、I 2 +2KBr=2KI+Br 2 C、Br 2 +Na 2 S=2NaBr+S D、Cl 2 +2K 2 S=2KCl+S
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举一反三
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A.
We can do that by checking the total debits and the total credits to see whether they are in the state of balance.
B.
We can examine all the transactions carefully and find the wrong records.
C.
We can balance the total debits and the total credits by posting them again.
D.
We can post all the entries again and correct the mistakes.
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药物本身作用、药物相互作用
B.
药物制剂、药物相互作用
C.
药物制剂、药物的使用
D.
药物本身作用、药物相互作用、药物制剂和药物的使用
E.
药物本身作用和药物的使用
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温度保持在70-85℃
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相关题目：
【单选题】Which is the best way to prove that no transactions are missing or wrong at the end of the day?
A.
We can do that by checking the total debits and the total credits to see whether they are in the state of balance.
B.
We can examine all the transactions carefully and find the wrong records.
C.
We can balance the total debits and the total credits by posting them again.
D.
We can post all the entries again and correct the mistakes.
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【单选题】诱发药源性疾病的药物因素包括
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药物本身作用、药物相互作用
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药物本身作用和药物的使用
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【单选题】It was luck again, according to Nina, that brought her the role in Mute Wife ______ she is best known.
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which
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夜盲症
B.
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C.
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【简答题】We hear with our ears, right? Yes, but scientists have known for years that we also hear with our eyes. In a study published in 1976, researchers found that people combined both auditory cues(听力提示) an...
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温度保持在70-85℃
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C.
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A.
Sports injuries.
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Falls.
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Dental caries.
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【简答题】Listen to the passage again and choose the best answers to the following questions. Which is the most difficult challenge for parents in handling children’s music lessons?A. Choosing the instrument. B...
查看完整题目与答案