题目

下列关于使用高倍显镜的叙述正确的是A. 因为蘚类植物的叶片大，在高倍显微镜下易找到，可以汽接使用高倍物镜观察B. 若目镜放大倍数是10，物镜放大倍数是40，被观察的细胞面积放大400倍C. 换用高倍镜后，必须先用粗准焦螺旋调焦，再用细准焦螺旋调至物像最清晰D. 低倍镜视野中看见了一个细胞的图像，但较模糊不够清晰，这时应当采取的措施是用细准焦旋调节根据中外提示和英文书信内容，写一封意思连贯、符合逻辑、不少于６０词的回信，信的开头恶化结尾已给出，其词数布局如梭完成的回信内。请不要写出你的校名和姓名。７５。加上你叫刘京，是美国中学生托尼的笔友，你收到他的来信。请给托尼写一封回信，回答他的问题，介绍北京良好的公交服务，并谈谈你的感受。　Hi! Liu Jing,My grandpa is going to Beijing next month because he ahs heard a lot about the city and he would like to see it himself. He says the bus service in Beijing is very good now, and people can to anywhere by bus. Is he right? Can you tell me something more about it?I’m looking forward to hearing from you soon.Yours,Tony  Hi! Tony,I’m glad to know your grandpa is coming to Beijing. ________________________________________________________________________________________ If you have more questions, please ask me.Yours,Liu Jing