从某高度处以12m/s的初速度水平抛出一物体，经2s 落地，g取10m/s2，试 发布时间：2017-05-22 14:06 │ 来源：www.tikuol.com 题型：计算题 问题： 从某高度处以12m/s的初速度水平抛出一物体，经2s 落地，g取10m/s2，试求：（1）物体抛出处的高度是多少m？（2）物体的水平位移是多少m？
题型：计算题 根据句意和首字母提示，写出单词1. Last night he went home a__________.2. Look! Mary is carrying a basket f__________ of flowers.3. I had great d__________ doing the work.4. That nurse is very p__________ with little children. 5. She left a m__________ ago. 查看答案
题型：计算题 The early expansion of the sugar industry was based on cane transported from two different parts of the Orient, first from India and second from the islands of the Southwest Pacific. From India, sugar cane was carried through the western regions of Asia into Arabia and later into the countries bordering on the Mediterranean. It was established in Sicily in about A. D. 703 and was carried to Spain in about A. D. 755. As early as A. D. 1,150, Spain had at least 75,000 acres of cane. During this early period sugar cane was grown largely to supply local wants. The Crusades were partly responsible for the further expansion and improvement of the sugar industry and for interesting Europeans in the use of sugar. 查看答案