多项选择题，在各个待选项中有一个或几个选项是正确的，各选项往往是对一个或几个物理量处于事物发展变化中的相同或不同的过程、状态、阶段或时刻时的一个或几个方面（如大小、方向、变化情况等）进行描述，事物有时在同一条件、同一过程中会出现不同的现象和结果；有时在不 A multiple-choice question, where one or more options are correct in each candidate, each option is often one or more than one in the same or different process, state, phase, or time of day that the physical quantity is in the evolution of the object. Or in several aspects (such as size, direction, change, etc.) to describe things that sometimes occur in the same conditions, the same process, different phenomena and results; sometimes not