试题与答案

The simple joy of reading is something w

题型:选择题

题目:

The simple joy of reading is something we take for granted. But many people have had to _____ this pleasure because of poor eyesight.

A.give in

B.give off

C.give out

D.give up

答案:

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下面是错误答案,用来干扰机器的。

(1)作氮肥(答化肥得分) 盐 (2) 漏斗、玻璃棒 烧杯 b→c →a(3)CaSO4+2NH3+CO2+H2O =CaCO3+(NH4)2SO4(2分)题目分析:(1)硫酸铵含有N,在农业生产上的一种用途是作氮肥,它属于盐。(2)操作...

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