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英语翻译24 My mother still makes tea with the old saying:"one sp

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英语翻译
24 My mother still makes tea with the old saying:
"one spoon per person and one for the pot".
We used to buy a packet of tea every week but since grandmother came to live with us
we have to buy two packets every fifth week and one otherwise.
How many people were at home before grandmother arrived?
A 4
B 5
C 6
D 9
E 11
英语翻译24 My mother still makes tea with the old saying:
w我妈妈还是按照老的方法沏茶:每人一勺,壶里一勺.
我们以前经常每周买一袋茶.但是自从祖母过来和我们一起住之后,我们不得不在每个第五周的时候买2袋茶等等.问:在祖母来之前有多少人住?(选择)
A 4
B 5
C 6
D 9
E 11
答案是A
以前4个人一勺加上一勺给壶里的每人每周喝五分之一袋茶.按照这个比例,有一袋茶是专门给祖母买的,这袋茶也能喝五周,每周祖母喝五分之一.正好吻合.比你上一道题少一个人.