火星离地球最近时角直径为24”,用F=19.5米的折射望远镜所摄得的火星像的直径为( 发布时间:2017-11-17 02:59 │ 来源:www.tikuol.com 题型:单项选择题 问题: 火星离地球最近时角直径为24”,用F=19.5米的折射望远镜所摄得的火星像的直径为()毫米A.0.24B.2.27C.8.68D.13.61
题型:单项选择题 50. The lazy boy got up very late and went to school in a hurry. When he arrived at school, he found that he had put his socks on _______.A.outsideB.inside outC.side outD.back out 查看答案
题型:单项选择题 在核算农村经济总收入时,农户自食自用和储存的农副产品应按()计算。A.该产品收获入库时的市场平均价格B.国家公布的最低收购价格C.出售全部该商品的综合平均价格D.生产该产品的实际成本 查看答案