2022英语周报第三期七上答案

选惨1:生物技术实践】(12分每空2分)1)细胞壁、细胞膜、核糖体DNA和RNA2)阻挡外界空气中的杂菌进入,防止杂菌污染3)酵母菌、醋酸菌、乳酸菌(顺序错误不得分)k4)蛋白酶和脂肪酶等酶类色泽、口味块形等试题分析】()酵母菌醋酸菌毛排等都具有细胞壁细胞膜都含DNA和RNA,细胞中都有核糖体。(2发酵装置的排气口通过一个长而弯曲的胶管与瓶身相连目的是阻挡外界空气中的杂菌进人,(3)酵母菌、醋酸菌、乳酸菌分别为兼性厌氧菌、好氧菌和厌氧菌。兼性厌氧菌随氧气浓度增大无氧呼吸逐渐受到抑制,有氧呼吸逐渐增强,导致总呼吸强度先下降,后上升;好氧菌随氧气浓度的增大,有氧呼吸逐渐增强;厌氧菌随氧气浓度的增大无氧呼吸逐渐被抑制(4)腐乳制作利用了微生物(主要是毛猫产生的蛋白酶和脂肪酶,将豆腐中的蛋白质和脂肪分解成小分子物质。一款腐乳的品质可从色泽、口味块形等几方面进行评价

第二节One possible version:I had made a fool of myself and every girl in the seventh grademust be laughing at me. The next day at school, when I wasn'tthe focus of every joke, I realized that Nicole could not have saidanything. Only then did i have time to think about how deep I hadhurt her definitely. As I knew, she was not an outgoing kind of girlHow hard must it have been for her to cross over to invite me. Butmy ridiculous reaction ruined everything. I couldnt help thinkingwhat I could do to make it up to her.With October came another dance. On stepping into thegym, I anxiously looked for Nicole. There she was, sitting in acorner, paying close attention to all the dancing couples. Takinga deep breath, i gathered courage to step forward. Lady, may Ihave the honor to dance with you? "I reached out my hand to her.We started to sway. We trusted each other. This time, everythingwent perfectly. This was my first dance, which led to my fullunderstanding of bravery, and most importantly, of dance

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