题目

下列实验方案合理的是（    ） 选项实验目的所用试剂或方法 A鉴别黄铜和黄金观察颜色 B鉴别水和过氧化氢溶液加入二氧化锰 C除去二氧化碳中少量的一氧化碳点燃 D除去FeCl2溶液中的CuCl2                     答案：B   加入铁粉I really enjoyed our class visit to Mr Smith's farm. It was my first visit to a real farm. The first thing I noticed was the smell. Everywhere smelled of animals. Then I noticed the noise. I could hear many noises but I did not know which animals made them.During the day we saw sheep,pigs,cows,dogs and two old horses called Boris and Max. We also saw the farmer's tractor,which was driving up and down the corn fields.But the best of all was milking the cows. Farmer Smith asked me to try. I was worried,but after a while I found it easy to pull the cow's udder (牛、羊等的乳房) and let the hot white milk flow down into the pen. I want to go back to the farm and do it again,It was a lovely day.Kate(   ) 6. The above reading is most probably .   A. a letter to Kate   B. an advertisement about a farm   C. a report of a visit   D. a story of a farm(   ) 7. How many kinds of animals are mentioned in the reading?   A. Two. B. Three. C. Four. D. Five.(   ) 8. The first thing on the farm the writer noticed was         .   A. two horses   B. the noise   C. the smell   D. the tractor(   ) 9. We know from the reading that the writer visited the farm   A. by himself   B. for the first time   C. with Mr Smith   D. by tractor(   ) 10. It seemed that the writer liked        the most.   A. the corn fields   B. milking the cows   C. two old horses   D. the smell of animals