我们设备的BITS信号在电缆中传输的最长距离是多少?()
A.100米(100m);
B.200米(200m);
C.300米(300m);
D.400米(400m)。
参考答案:D
Although the city had been attacked by the storm several times, _____was done.
A.a few damages
B.few destroy
C.little hurt
D.little damage
以下是我们生活中可见到的几种现象:
(1)用力揉面团时,面团形状发生了变化;
(2)篮球撞在蓝板上弹回;
(3)用力捏皮球,皮球被捏瘪了;
(4)一阵风把地面上的灰尘吹得漫天飞舞.
在这些现象中,物体因受力而改变运动状态的是( )
A.(1)(2)
B.(2)(4)
C.(3)(4)
D.(2)(3)