A:16
B:15
C:14
D:13
公路上的拱形桥是常见的,汽车过桥最高点时的运动可以看做匀速圆周运动.如图所示,汽车通过桥最高点时( )
如图是测量汽车质量的地磅示意图,汽车的质量可通过电流表的示数读出,下列说法正确的是( )
— Excuse me, sir. Please don't take photos in the museum. Look at the sign .
— I'm sorry. I didn't notice it just now.