2021-2022学年高一英语周报外研版第19期答案

书面表达One possible versionDear PeterI'm writing to invite you to see the Chinese Painting Exhibition to be held in our city.The exhibition will start at 8: 30 am on Saturday and last till 5: 00 pm on Sunday in the city museum It'ssaid that a large number of Chinese paintings, some of which are original works by famous painters like ZhangDaqian and Qi Baishi, will be on display. Besides, there will be various souvenirs to be sold. I know you re veryinterested in traditional Chinese culture, so I can t wait to tell you the news and hope we can go together.Looking forward to your reply.You

12.D【解析】大豆芽自身也可以产生生长素,植物体内生长素的合成部位是幼嫩的芽、叶和发育中的种子,因此A、a两组的大豆芽内也含有生长素;实验一为预实验,在正式实验时,浓度梯度设置在B和D之问,不需要设计空臼对照;根据实验一的结果可知.B、C、)组胚轴长度均高于A组,说明生长素具有促进生长的作用没有体现抑制生长的作用,故不能体现生长素的作用具有两重性;分析实验…和实验二结果可以推测出较高浓度的生长素可能促进乙烯的合成从而抑制细胞伸长。故选D。1

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