题目

You will find traffic noise disappearing as soon as you arrive in Venice. So as you walk down the narrow streets , you only have to avoid （避免）crowds of people.3  About 19 million travellers visit Venice for the enjoyable environment, art and food each year. Seeing Venice on foot is the best. You can walk through the city in about an hour. Look around St.Mark’s Basilica and the Doge’s Palace. 4 But you should know walking along the streets isn’t as easy as traveling on the city’s canals. The canals are Venice’s “streets”. And you can enjoy the Grand Canal, the Rialto Brid如图所示：甲图中①②表示目镜，③④表示物镜，⑤⑥表示物镜与载玻片之间的距离，乙和丙分别表示不同物镜下观察到的图象。下面描述正确的是（ ） A. 观察物像丙应选用甲图中的组合是②③⑤B. 把视野里的标本从图中的乙转为丙，物镜与载玻片之间的距离由⑤转为⑥C. 从图中的乙转为丙的正确调节顺序：转动转换器→调节光圈→移动标本→转动细准焦螺旋D. 如果丙是由乙放大10倍后的物像，则观察到的细胞面积增大为原来的10倍