________, I'd like to say how much I've enjoyed staying in your beautiful country.
A:As a result
B:In common
C:In conclusion
D:In turn
65-26= 60-19= 100-24=
27+39= 58+37= 92-45=
汽车以10m/s的速度在平直公路上匀速行驶,刹车后做匀减速运动经2s速度变为6m/s,求: