相当
如图所示，设质量为m的子弹以初速度v0射向静止在光滑水平面上的质量为M的木块，钻入木块深度为d后留在木块中．求木块对子弹的平均阻力的大小和该过程中木块前进的距离．
如图所示，设质量为m的子弹以初速度v0射向静止在光滑水平面上的质量为M的木块，钻入木块深度为d后留在木块中．求木块对子弹的平均阻力的大小和该过程中木块前进的距离．
I will not lend the book to you _____ you can return it in time.
I will not lend the book to you \_\_\_\__ you can return it in time.
It’s very _____ and very kind of you to offer me this lovely holiday.
It’s very \_\_\_\__ and very kind of you to offer me this lovely holiday.
_____ wants to see the movie may get a free ticket.
\_\_\_\__ wants to see the movie may get a free ticket.
He bought her what she wanted, _____ the fact that they were costly.
He bought her what she wanted, \_\_\_\__ the fact that they were costly.