做20节直径是12厘米,高1.5米的铁皮烟囱,需要铁皮多少平方米? 发布时间:2017-05-06 00:22 │ 来源:www.tikuol.com 题型:解答题 问题: 做20节直径是12厘米,高1.5米的铁皮烟囱,需要铁皮多少平方米?
题型:解答题 Christina wasn’t saying anything, but the professor smiled at her _______she had done something very clever. A.as ifB.now thatC.whileD.though 查看答案