2022-2023年 英语周报 高一 课标 第3期答案

2022-2023年 英语周报 高一 课标 第3期答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本网站。

8.参考答案D说明分析A正确该实验中的萃取剂为石油醚,石油醚易挥发、易燃,为了避免暴沸和防止逸出的石油醚与空气混合爆炸,提取过程不可选用明火直接加热。B正确,根据图示装置,与常规的萃取相比,索氏提取器中当萃取液液面达到虹吸管顶端时,经虹吸管返回烧瓶,萃取后萃取液石油醚可循环连续萃取,萃取液使用较少,萃取效率髙。C正确,烧瓶中的石油醚受热经侧管进入冷凝管,冷凝后进入滤纸套筒与碎花生接触进行萃取,当萃取液液面达到虹吸管顶端时,经虹吸管返回烧瓶,实现对碎花生的连续萃取。D错误,为了防止暴沸,加热前需要加入沸石

第二节参考范文The girl's mother told Kelly that they were moving to another city. After that they could no longer run thefairy garden. She had reached an agreement with the community that planned to turn it into a park for local resi-dents to relax in, But her daughter did not want to leave the garden, and she had cried several times. She waseven more unwilling to leave her dear fairy. Her mother wanted Kelly to meet her daughter personally. but shewasnt sure how to make her daughter happy.The girI's mother preferred Kelly to act as a fairy to say goodbye to her daughter. Kelly accepted thegirls mother's request. Then they agreed on a time and a place to meet. On the day of the meeting, Kellyappeared in front of the girl dressed like a fairy. The little girl was surprised and delighted to see her. theyjoined hands and started dancing. She chatted excitedly with Kelly for a long time, Kelly gave her many giftsthat she liked. The girl made Kelly promise that Kelly would visit her often.

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