高二暑假专版考考你答案.docx

林老师考考你 （题号：261） 某报纸称：非洲一个小男孩被遗弃在荒原，无人陪伴，饥饿而死。各国是否能够放下它们之间的分歧共同努力…, 灾难将考验人们的信念。请以此为线索，用我们本课所复习的词汇和句式写一篇100字左右的文章。(至少使用6个词组和2个句式)Possible version:It was declared by a newspaper that a hungry African boy was left alone in the wild and accompanied nobody else so that he died of hunger. The reason why it happened is that there is still not enough food for the people in the world, especially in Africa. On the one hand, many people felt great sympathy for the children there. On the other hand, they don’t know what to do, so they rang up the newspaper. In fact, it was any little help that can make a difference. To our satisfaction, many countries have set aside their differences and worked together to fight against hunger. Disaster will test out people’s faith and beliefs. 李老师考考你 （题号：262） 某运动员射击一次所得环数的分布如下：78910 现进行两次射击，以该运动员两次射击中最高环数作为他的成绩，记为. (I)求该运动员两次都命中7环的概率(II)求的分布列解：(Ⅰ)求该运动员两次都命中7环的概率为；(Ⅱ) 的可能取值为7、8、9、10 分布列为78910P0.040.210.390.36(Ⅲ) 的数学希望为.易错点揭示：在求最高环数为8环时，有一种可能是7环、8环，学生容易认为其概率值为0.2×0.3，没有考虑到两次射击依次为7环、8环和8环、7环，其概率值应为2×0.2×0.3。总结与启迪：本题考察学生对于离散型随机变量的概率及期望的求法的掌握，另一方面也考察学生分类讨论的数学思想和运算能力。林老师考考你 （题号：263）记叙文要用具体的事件和生动的语言对人、事、物加以叙述。一篇好的记叙文的语言既要准确、生动，又要表现力强，这样才能把人、事描写得具体生动，其可读性才强。下文在高考中只能评70分（假定作文满分100），试修改下文，使其叙述更准确生动，挑战满分作文！原文：（得分70） One day, Xiaoqiang was wandering away. He was soon lost among people and traffic. He could not find the way back home and started crying. Just then, two young students who were passing by found him standing alone in front of a shop and crying. They went up to Xiaoqiang and asked him what had happened. Xiaoqiang told them how he got lost and where he lived. The two students decided to take him home. Mother was pleased to see Xiaoqiang come back safe and sound. She invited the two students into the house and gave them some money, but they didn’t take it. She served them with tea but they left. 修改后： The other day, five-year-old Xiaoqiang left home alone and wandered happily in the street. After some time, he felt hungry so he wanted to go back