题型:填空题 (1)2008年北京奥运会开幕式于8月8日在被喻为“鸟巢”的国家体育场举行、国家体育场建筑面积为25.8万平方米,这个数用科学记数法表示为______平方米;(2)将4006300保留3个有效数字,其近似数为______. 查看答案
题型:选择题 My friend asked me _______. [ ]A. if I will come to the party B. that he would help me to clean the room C. what was wrong with me D. how should he do it next 查看答案