问题
选择题
— Why not go out to have a tea over the break?
— _______.[ ]
A. No. I haven't got any change
B. No. I'm really not in the mood
C. No. I'm not thirsty
D. No. It's my treat this time
答案
答案:B
— Why not go out to have a tea over the break?
— _______.[ ]
A. No. I haven't got any change
B. No. I'm really not in the mood
C. No. I'm not thirsty
D. No. It's my treat this time
答案:B
一辆汽车在平直公路上行驶,t=0时汽车从A点由静止开始匀加速直线运动,运动到B点开始刹车做匀减速直线运动直到C点停止.测得每隔2 s的三个时刻物体的瞬时速度记录在下表中,由此可知 ( )
t/s | 0 | 2 | 4 | 6 |
v/(m·s-1) | 0 | 8 | 12 | 8 |
C.t=10 s的时刻物体恰好停在C点 D.A、B间的距离大于B、C间的距离