5.D【解析】当两物体一起运动时,对a、b整体受力分析,由牛顿第二定律可得两物体一起运动的加速度为F2m 2mn对物体b受力分析可知,水平方向只受水平向右的静摩擦力,由牛顿第二定律得F=F1=ma=2,可见,a、b之间的摩擦力是定值,物体ab之间的弹力为FN=mg-Fa=mg-qB,当速度增大时,物体a、b之间的弹力逐渐减小,A错误;a、b一起运动时,加速度不变,做匀加速直线运动,当a、b发生相对滑动后,a先做加速度增大的直线运动,当a、b分离后,物体a将做曲线运动,B错误;当两物体一起匀加速运动时,两者之间是静摩擦力。而最大静摩擦力等于滑动摩擦力,由于两物体一起匀加速运动时,两者间的弹力逐渐减小,所以两者间的最大静摩擦力也逐渐减小,当a、b之间的最大静摩擦力减小为一qE时,a、b就要发生相对滑动,D正确,C错误。

二、读后续写范文(满分25分)Possible version 1Paragraph 1:It was time to put an end to the Magic Marty show. I walked over. "It was fishing line. " I sneeredfolding my arms. Marty subconsciously fingered the fishing line and nervously whispered, "So, are yougoing to tell people? Seeing the panic in his eyes, somehow, I hesitated. Should I_reveal the secret, Martymight lose his new_ friends. Finally, after struggling for a moment, I replied, "Nah, I won't say anythingMarty let out a relieved sigh, and I turned to walk awayParagraph 2Waitr"Marty jumped in front of me. Unexpectedly, he patted my arm, grinning. "You' ve got a prettygood eye for magic. Want to join me? "I nodded joy fully. That's how the Magic Marty and MysteriousMatt Lunch Show began. Now we've been a magic team for three months. And since I became a fellowmagician, Marty has let me in on some of his other tricks. It turns out that instead of a fake magician, Martyis a real friend.(150 words

以上就是2022英语周报高考外研第二期练习题答案，更多英语周报答案请关注本网站。

本文地址： http://www.ncneedu.cn/post/5029.html

文章来源：admin

版权声明：除非特别标注，否则均为本站原创文章，转载时请以链接形式注明文章出处。