一平行板电容器，极板上带电量为Q时，测得两极板间的电压为V,电容为C.将极板上的带电量增加为2Q，则测得的电压和电容应为()

一确定静电场中某点的电势值取决于（）

When we returned from our vacation, our nextdoor neighbors were ______ a new garage built.

发展先进的生产力是实现我国最广大人民根本利益的()

Good parents have the ability to communicate messages of love, trust, and self-worth ______their children

下列叙述中正确的是()

如图，弹簧振子在光滑水平面上作简谐振动，当其到达最大位移处时，恰有一泥块从正上方落到振子上，并与振子粘在一起运动，则振子振动的()

The question he asked was _______ I come here.

We knew the boss________be angry if we didn ’t finish the work in time.

一质点在xy平面内运动，运动方程为r=2ti+(3t2+2)j，则该质点的运动轨迹是()