题目

阅读短文，从方框中选择适当的单词填空 (每词限用一次)。       population     dream      is      of      so      Changqing has a long history but it is the new district of Jinan. It 39．_________ in the west of Jinan. and covers 1178 square kilometers. The 40．_________ of Changqing is about 530,000. It has convenient transportation 41．_________ it’s easy to get here. There are many ancient places of interest for you to visit, such as Lingyan Temple, Xiaotang Hill and so on. It has changed a lot since it became the new district of 如图所示，两拫等长的轻绳AB、CD将日光灯悬挂在水平天花板上，AB绳、CD绳与天花板间的夹角都为 60°，日光灯质量为m，则AB绳、CD绳所受拉力大小分别为A.mg和mgB.mg和mgC.mg和D.和mg