巨急!英语的（一定是英语的）最最最最感人最好是关于爱情的故事字数少一点的!

水可以被检验出来,因为水一通入遇无水硫酸铜,无水硫酸铜就变蓝;
SO2和CO2都不能被检验出来,因为他们是酸性气体,都被氢氧化钙吸收了,即使氢
氧化钙变浑浊也不不知道是哪种气体引起的,品红也就失去检验SO2的意义了

6x+5y+4(20-x-y)=100
6x+5y+80-4x-4y=100
2x+y=20
y=-2x+20

chicken在做“小鸡”讲的时候是可数名词；在做“鸡腿”讲的时候是不可数名词 a lot of chickens是指许多小鸡

答案A
a few of 是肯定
few of 是否定的,所以反意疑问句要用肯定的.
I'm afraid,I think,I believe,像这一类表主观感受的短语,在反意问句时,反意疑问是对从句中的谓语进行反意的,所以不说aren't I

except for 也表示“除 … 以外”,但是和 except 不同的是:与 except 连用的整体词和 except 所跟的词常常是同类的,是指整体除去一部份; 而与 except for 连用的整体词与 except for 所跟的词往往不是同类的,是指整体中除去 一个细节.例如:
Your composition is good except for a few spelling mistakes.
除了几处拼写错误以外,你的作文写得很好.

A fox is an animal belonging to any one of about 27 species (of which only 12 actually belong to the Vulpes genus,or 'true foxes') of small to medium-sized canids,characterized by possessing a long,narrow snout,and a bushy tail,or brush.By far the most common and widespread species of fox is the red fox (Vulpes vulpes),although various species are found on almost every continent.The presence of fox-like carnivores all over the globe has led to their appearance in the popular culture and folklore of many nations,tribes,and other cultural groups.

Dear Tom,I am so happy hearing you will get wedding on sunday,and you invite me go to your wedding make me so excited.I konw you are waring for this moment so long.As your close frind ,I should witnes...

是的,分成水平和垂直的,然后再合成