—Do you have a basketball? —______.
A：Yes, I do
B：I do
C：Yes, I have
D：Yes, I've
What happened？
____ hit an old man.
Where did the accident happen？
On ____
Who sent the man to the hospital?
____
Is the traffic busy now？
What's the suggestion of the reporter?
To go____.
某质点做匀变速直线运动，在连续两个2 s内的平均速度分别是4 m/s和10 m/s，该质点的加速度为( )
