LOC的18NM内水平覆盖范围是跑道中心线两侧各()。A.10度 B.15度 C.2 发布时间:2020-01-20 16:02 │ 来源:www.tikuol.com 题型:单项选择题 问题: LOC的18NM内水平覆盖范围是跑道中心线两侧各()。A.10度B.15度C.25度D.35度
题型:单项选择题 John likes 1 (read) very much. His father has a library and the boy 2 (read) most of the books in it. So he often 3 (borrow) books from the school library. He reads books when he 4 (be) free and does nothing but reading at home on Weekends. Once he even 5 (read) a novel in class because it was very interesting. Of course he couldn’t hear what the teacher 6 (say). So he 7 (fall) behind. The headmaster had a talk with him and told him 8 (not read) novels in class. At last, he realized that he was wrong and said “I’m sorry, I 9 (not do) it again.” And now he reads books after he finishes 10 (do) all his homework.. 查看答案
题型:单项选择题 18.Everyone must have known the death of the waitress, __________?A.must theyB.mustn’t theyC.haven’t theyD.have they 查看答案
题型:单项选择题 的“U”型金属框架,其框架平面与桌面平行。其ab部分的电阻为R.框架其它部分的电阻不计。垂直框架两边放一质量为m、电阻为R的金属棒cd,它们之间的动摩擦因数为,且接触始终良好。cd棒通过不可伸长的细线与一个固定在O点的力的显示器相连,始终处于静止状态。现在让框架由静止开始在水平恒定拉力F的作用下(F是未知数),向右做加速运动,设最大静摩擦力和滑动摩擦力相等。最终框架匀速运动时力的显示器的读数为2mg。已知框架位于竖直向上足够大的匀强磁场中,磁感应强度为B。求:(1)框架和棒刚开始运动的瞬间,框架的加速度为多大?(2)框架最后做匀速运动对的速度多大? 查看答案