单选题中有一类题,由于题干中未给出某些量值,故答案只能位于一定范围内,这种单选题的题干最后一般都有“可能是”几个字,故叫“单选可能”题.这类题只能用范围判断法求解.[例1]地球半径为R,地面上重力加速度为g,在高空绕地球做匀速圆周运动的人造卫星其线速度大小可能是: There is a class of questions in the single-choice questions, because the questions do not give certain values, so the answers can only be located within a certain range. The questions of such single-choice questions generally have “may be” words. This is called the “possible single selection” question. This type of question can only be solved by the range judgment method. [Example 1] The radius of the Earth is R, and the gravitational acceleration on the ground is g. The linear velocity of an artificial satellite orbiting the earth at an altitude of uniform speed is linear. maybe: