①民主党派是参政党，能参与党和国家领导人选的协商

②民主党派能参与国家方针、政策、法律、法规的制定和执行

③***和民主党派在政治上是亲密合作的友党关系

④***和民主党派是监督和被监督的关系

    In the future I am going to be an inventor．This winter holiday I don't want to go out to play．I want to ____something myself at home．I want to help old people____a light and folding bike．They ride it to the ____，then folding it and put it in the bag．After buying some things they can ride it and carry their things to go ____．They are not tired．I think if they see it，they must be very ____．

水和干泥土的比热容之比是5：1，质量之比是1：2，吸收的热量之比是3：2，则水和干泥土升高的温度之比是（　　）

已知直线$x=0$绕点$\left(0,1\right)$按逆时针方向旋转$\frac{\pi }{4}$后所得直线与圆${\left(x-a\right)}^2+{\left(y-b\right)}^2=2\left(a,b>0\right)$相切,，则$\frac{1}{a}+\frac{4}{b}$的最小值为（   ）