1.C
2.D
3.A
4.D
5.C
6.向上,有益.
7.滚动.滑动.
8.摩擦生热温度升高.
9,摩擦力.
10.(1)压力和粗糙度有关.
(2)压力越大,摩擦力越大.
2与3
(3)控制变量法.
11.B,
谁有七年级下科学作业本B第6节摩擦的利与弊的答案快给我,
谁有七年级下科学作业本B第6节摩擦的利与弊的答案快给我,
要好的,
要好的,
物理人气:223 ℃时间:2020-03-25 15:07:53
优质解答
我来回答
类似推荐
猜你喜欢
- 1Where's shanghai?It's in the ______of china.
- 2[-3(a+b)²]的3次方·[2(a+b)³]²
- 37+14+21+28+35+42=?
- 4The Kangaroos' players went home proud that they had done their best.that引导了原因从句吗?
- 5梁可以组什么词,抑可以组什么词,省可以组什么词
- 6重10N的物体向右运动,物体与水平面之间的动摩擦因数u=0.10.若外加一水平向左的力F=20N,求加速度大小.
- 7已知AE是△ABC的BC边上的中线,O是AE的中点,连接BO并延长,交AC边于点D.求证:CD=2AD.
- 8两个质量分别为m1和m2的人造卫星,分别绕地球沿同一轨道平面的方向做匀速圆周运动,若它的轨道半径分别为R1和R2(R1
- 9A:What kind of ice cream would you like,chocolate or vanilla?
- 10( ) Look,all of her family ____TV at home.A.is watching B.watch C.are watching D.watches