题目

阅读下面短文，从每题所给的a、B、C和D四个选项中选出可以填入空白处的最佳选项。 Askpeople to name the world's tallest peak and anybody with sound generalknowledge will name Mount Qomolangma. But quiz them on its exact 1and many will be not sure. In1975, Chinese surveyors 2 that Mount Qomolangma (Mount Everest) was8848. 13 meters high. As 3 improved, satellites, photoelectricity, radarsand gravity measurement technologies were 4 to get more exact figures. Of course, someonestill had to carry 5 to what is the world's rooftop.In 2005, a Chinese team scaled Qomolan做10节底面直径20厘米，长1米的烟囱，至少需要______平方分米的铁皮．