问题
多项选择题
消火栓箱按安置方式可分为（）。
A.挂置式
B.明装式
C.卷盘式
D.卷置式
E.托架式
答案
参考答案：A, C, D, E
解析：消火栓箱按水带的安置方式可分为：挂置式、卷盘式、卷置式、托架式。
搜题请搜索小程序“爱下问搜题”
消火栓箱按安置方式可分为（）。
A.挂置式
B.明装式
C.卷盘式
D.卷置式
E.托架式
参考答案：A, C, D, E
解析：消火栓箱按水带的安置方式可分为：挂置式、卷盘式、卷置式、托架式。
| 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. |
The Law of Inertia is a law concerning ______.
A．motion
B．distance
C．position
D．direction