人的质量为m1，车的质量为m2，人站在车上用水平力F推固定在车上的挡板，若不考虑
题型：不定项选择
问题：
人的质量为m1，车的质量为m2，人站在车上用水平力F推固定在车上的挡板，若不考虑地面对车的摩擦力时，小车的加速度为[ ]
A.0
B.
C.
D.
题型：不定项选择
单词拼写（共5小题；每小题1分，满分5分）
请根据首字母或汉语提示完成句子。
小题1: After hearing the bad news, he a______ himself to sadness.
小题2:The police are trained to deal with every situation in a calm and p______ manner.
小题3:F __________, the traffic wasn’t
too bad so I managed to go to the meeting on time.
小题4:What a ________________(极好的) idea!
小题5: The look on his face is ______________(令人害怕的).