At present, one of the arguments in favor of the new airport ________ that it will bring a lot jobs to the area. A. is B. are C. will be D. were 答案:A 本题考查时态的用法。根据at present =now 可知,应用一般现在时。 质点做直线运动的v-t图象如图所示,规定向右为正方向,则该质点在前8s内平均速度的大小和方向分别为( )A.0.25m/s 向右B.0.25m/s 向左C.1m/s 向右D.1m/s 向左