一辆电车从静止开始，做匀加速直线运动，加速度大小是2 m/s2，则它在前4 s内行驶的路程等于________m。
16
I took the wrong train . I didn't even know it until half an hour later. [ ]
A. by mistakes
B. by mistake
C. with mistake
D. with mistakes
平安智盈人生终身寿险（万能型）特色有（）
A.保额自选，灵活可变
B.投资保底，理财方便
C.持续交费，奖励多多
D.缓期交费，保障不变
E.保单价值，透明公开
