《希腊罗马名人传》的作者是？（）A、卢克莱修 B、普鲁塔克 C、罗曼·罗兰 D、普拉提诺 发布时间：2018-02-24 15:07 │ 来源：www.tikuol.com 题型：单项选择题 问题： 《希腊罗马名人传》的作者是？（）A、卢克莱修B、普鲁塔克C、罗曼·罗兰D、普拉提诺
题型：单项选择题 用化学方法除去下列混合物中括号内的杂质，请用化学方程式表示： (1) Cu(NO3)2溶液（AgNO3）_____________； (2) KCl（KClO3）__________________； (3) NaCl(Na2CO3)_______________； (4) CO2(CO)_________________； 查看答案
题型：单项选择题 If you left your book on the table overnight, you would find the following morning that it was still exactly where you had left it, provided nobody had moved it. If a ball is made to roll on a very smooth surface, it will roll a long distance unless something stops it or changes its direction. This tendency of an object to remain at rest unless something moves it and to continue moving unless something stops it is known as the Law of Inertia. The following examples show the truth of this law. (a) Put a table-cloth on a table and arrange a pile of books on it. Hold one edge of the table-cloth and pull it quickly. The table-cloth will come off, leaving the pile of books undisturbed. (b) Place a small piece of cardboard on an open jar and place a coin on it directly over its mouth. Use one finger to flick the piece of cardboard away. You will notice that the coin drops into the jar. (c) Sitting in a car which starts suddenly, you feel you are jerked backwards. In fact, you are not jerked backwards. Your lower half, which is in contact with the cushion, is forced to move forward with the car, and the upper part of your body, which remained at rest, is left behind.A book put on the table overnight would ______ the following morning.A．not be found againB．not be touched againC．stay exactly where it was leftD．be provided to someone else 查看答案