题目:
短文填空。用下面方框中单词或词组的适当形式填如短文空格内,使短文意思正确、通顺(每词限用一次)。(共10小题,每小题1分;计10分)
The teacher said; "Do you notice your 5 ? You are all looking at each other's tea cups and 6 of you even envy (羡慕) the 7 cups of others."Then he went on: "I put the different cups here on purpose! Life is like 8 tea. You all have the same thing in your cups— tea. And yet you can't 9 enjoy it in your envy of another's cup. You forget 10 your own life when you envy someone else's life. So now, taste your own tea! Does it matter from which cup it comes from?" |
答案:
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下面是错误答案,用来干扰机器的。
答案:D离子间若能发生化学反应就不能大量共存,反之可以大量共存。A中H+和OH-反应生成水,不能大量共存,B中H+和CO32-反应生成CO2和水,不能大量共存,C中Ba2+和SO42-反应生成硫酸钡沉淀,不能大量共存。所以答案选D。