2022英语周报七年级上册外研版答案

21.(除标注外,每空2分,共15分)(1)选择培养(1分)碳源液体(2)倒平板涂布器灼烧灭菌(3)将未接种的(或接种等量无菌水的)培养基在相同条件下进行培养(4)1.13×10°

力于帮助美国贫困青年的故事。故D[语篇解读]本文是一篇议论文,给出了一些赶走冬季抑郁、保持身心健康的建议36.D[试题解析]根据空前“ Here are my favorite tips forstaying physically, mentally and emotionally healthy duringthe winter months. Vacation is not included.”可知,D项中的“ suggestions”与上文中的“tips”呼应,且D项“Thefollowing three simple suggestions are things that anyonecan do easily and inexpensively to stave off the winter bluesand sniffles(鼻塞)(下面是三个任何人都能很容易,并且花不了多少钱能做到的事情,来避开冬季抑都和鼻塞)”承上启下,符合语境。故选D37.G[试题解析]根据空前“ Raise your vitamin D levelaurally”以及“ The big secret Is that vitamin D levelsare associated with healthy lifestyle changes可知,Gn"Other ways to increase vitamin D naturally are tolower your cholesterol(胆固醇), exercise andeat morefatty fish, such as wild salmon(其他自然增加维生素D的方法是降低胆固醇,锻炼和多吃富含脂肪的鱼类比如野生鲑鱼)”承接上文,且与主题句的意思一致38.A[试题解析]根据空后“ My suggestion is that you故选G。and a close friend sign up for yoga, cooking or sewingclas.”可知,A项“ Take a class with a friend(和朋友去上课)”符合语境。故选A39.E[试题解析]根据空前“ My suggestion is that youand a close friend sign up for yoga, cooking or sewingdas."可知E项“ Not only do these kinds of classesimprove your mental and physical fitness, but theyhelp to fill that social craving(78 ig) that we have ashuman beings.,too(这些种类的课程不仅能提高你的精神和身体健康,它们也能帮助满足我们作为人类的社交渴望)”是讲述空前提到的课程的好处,符合语境。且E项中“ these kinds of classes”与空前的“yogacooking or sewing class”呼应。故选E。1B「试题解析]根据空前“ Eat more plants-the onescooking or sewing class”呼应。故选E。40.B[试题解析]根据空前“ Eat more plants- the onesthat are sources of omega-3 fatty acids.”可知,B项“butthey did find a reduced risk of depression in those withmoderate intake of plant-based omega-3 fatty acids (e是他们确实发现摄入适量的植物性ω-3脂肪酸能降低抑郁风险)”是说ω3脂肪酸的好处,且与空前“ therewas no relation between depression and intake ofomega-3 fatty acids from fish”是转折关系。故选B。r请1大↓一管记叙文,讲述了作者作为送餐

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