2022英语周报 0 八年级 课标 19答案

19.(1)2M灬s3 70,2nO3 4S02(2分)将反应物粉碎、适当增大空’(的通人量(合理即可,2分)(2)BD(2分)(3)蒸发浓缩、冷却结品(2分)(4)过滤(1分)漏斗烧杯(1分)(5)9.71×10(2分)

One possible versionSeveral minutes later, the ice broke suddenly and Harry's feet sank into the water. It was noep, but his legs got wet to the knees. Harry was so upset that the accident would delay hisschedule. He had to find some firewood to build a fire to dry his clothes. He pulled off his glovestook out his matches, and lighted the fire. Seeing the burning fire, he had thought he was safe. Butsuddenly, without warming, a heavy mass of snow dropped down. The flame of hope was put outUnluckily, his dog ran away and the fear of death came over Harry. He had no choice but torun to save himself. However, he did not feel his feet when they hit the ground. Having falleneveral times, he decided to rest a while. As he lay in the snow, he noticed he was not shaking. Hecould not feel his nose or fingers or feet. A feeling of horror came into his mind. It was when herealized he was going to die that he heard a bark and the noise his friends made

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