题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。   Many schools require yearly parent teacher conferences for all students. _____.The list below is to help teachers prepare themselves for these often difficult conferences.   _____.When you have students who are struggling in either their academics or their behavior, you should communicate with their parents using notes or phone calls.   Come to the conference well-prepared. If the student is having a hard time with their work, show the parents their grades and sample空军特级飞行员李峰驾驶歼十战机执行战术机动任务，在距机场54km、离地1750m高度时飞机发动机停车失去动力．在地面指挥员的果断引领下，安全迫降机场，成为成功处置国产单发新型战机空中发动机停车故障、安全返航第一人．若飞机着陆后以6m/s2的加速度做匀减速直线运动，若其着陆速度为60m/s，求：（1）飞机着陆后12s内滑行的距离；（2）静止前4s内飞机滑行的距离．