计算： 3a•(-2b)2÷6ab．_刷题宝

题干

计算： 3a•(-2b)²÷6ab．

上一题下一题 0.0难度选择题更新时间:2017-12-28 01:19:05

答案(点此获取答案解析）

解：原式=3a×4b²÷6ab=12ab²÷6ab=2b

同类题1

化学在生产和生活中有重要的应用．下列说法正确的是（）

同类题2

如图甲所示，放在水平地面上的物体，受到方向不变的水平推力F的作用，F的大小与时间t的关系和物体运动速度v与时间t的关系如图乙所示．由图象可知当t=1s时，物体处于____状态，物体受到的摩擦力为____N；t=3s时，物体受到的摩擦力为____N．

同类题3

中纬度与低纬度，中纬度与高纬度的分界线是（）

同类题4

The truck ran down the hill, and the driver _________, according to the local newspaper, to have been killed.

同类题5

1. What was his ____ (反应) to your answer?

2. We have bought lots of ____ (设备) for our new lab.

3. The lock has ____ (生锈) and needs oil.

4. I came to the ____ (结论) that he had been lying.

5. He kept his ____ (平衡) with his arms on top of the wall.

6. The ____(沸腾的) kettle was giving off steam.

7. As a result of pollution，there are many dead fish ____ (漂浮) on the water.

小学学科试题库

初中学科试题库

高中学科试题库