2021-2022 英语周报 八年级 新目标SXQ答案

One possible versionThe Most Beautiful Place in My HeartAs a 17-year-ol teenager, I ve been to many great cities, among which Luoyang is the most beautiful one inlocated on the north bank of the luo river in western Henan pruvinee l aovany is surrounded by mountains on threesidles, high in the west and low in the east. At the end of 2019, Luoyang had a population of more than 7. I millionI love Luoyang so much due to the fact that as one of the four ancient capitals of China, Luoyang has a civilizationhistory of 5, 000 years. Whats more, the number of its heritage sites is second only to Beijing in cities of China. And itfamous tourist attractions inelude Lungmen Grottoes, Baima Temple, Guanlin and so on

21.(1)Ca(OH)2 NIL, CI(2分)石灰(合理即可,1分)排除装置中的空’,防止对实验产生十扰(2分)(2)0.05mlCa、0.05mlCu:0)(2分)(3)Nl·H2+C2=Nl1;+Ca(0)2(2分)(4)平衡’压便于液休刊滴下(1分)作安全瓶(1分)(5)称取一定贔的产物,加入足量浓Na溶液中并加热,将产生的’体卡燥后.再用稀硫酸吸收,根据吸收的N1的质量计算出AN的纯度(合理即可2分)

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