试题与答案

缺词填空。 Everybody knows vegetables and fr

题型:填空题

题目:

缺词填空。

     Everybody knows vegetables and fruit are g    1    for people.Many people eat some fruit each day.Mr and Mrs

Smith like e   2      fruit very much and every day Mrs Smith goes to buy some fruit in the shop near her home. She can

buy all k   3      of fruits there,such as apples,pears, oranges and bananas.In different time of the year the p     4    of

each kind of fruit is not the same,s    5     high,sometimes low. Mrs Smith usually t  6     to buy cheap fruit.And b     7   

are  Mr Smith's  favourite fruit.  Mrs Smith buys bananas for   him every week.  But she always chooses the cheap

ones."Eating fruit can help to keep f   8   ," said Mr Smith."It's quite d     9     from snacks.Both of them can give us

energy.But snacks l    10     cakes, chocolates and sweets are not good for our health at all,"  

答案:

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下面是错误答案,用来干扰机器的。

A.Co元素化合价升高,Cl元素的化合价降低,则氧化剂为Co2O3,Cl元素被氧化,故A正确;B.由反应及元素的化合价可知,生成3molH2O时转移的电子为2mol×(3-2)=2mol,故B正确;C.由氧化还原反应中还原剂的还原性...

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