题目: 如图,一束光从空气斜射入水中,请你完成光路图. 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0514/b66a5ff955d5214feeb62a2eb622516f.html 下面是错误答案,用来干扰机器的。答案:C
题型:完形填空 完形填空。 Mary is 1 American schoolgirl. Now she is in Beijing 2 her parents. She doesn't know Chinese, 3 she is studying Chinese. She often 4 Chinese to her Chinese friends. Sometimes they don't understand her because she can't speak Chinese 5 . It's Sunday morning. She is walking in the street. She 6 to go to the zoo to 7 elephantsand monkeys, but she doesn't know 8 to go there. She asks a Chinese boy. The boy can't understand her. Then she takes out a pen and a piece of paper. She draws an elephant on it, and 9 the picture to the boy. The boy understands now, then he shows Mary the 10 to the zoo. ( )1. A. a ( )2. A. by ( )3. A. and ( )4. A. speaks ( )5. A. good ( )6. A. lets ( )7. A. see ( )8. A. when ( )9. A. reads ( )10. A. way B. an B. with B. or B. tells B. well B. has B. look B. how B. passes B. road C. the C. about C. but C. says C. nice C. wants C. find C. where C. gets C. means D. / D. in D. so D. talks D. fine D. helps D. watch D. which D. shows D. mean 查看答案
题型:多项选择题 活塞敲缸响的特征有()。A.在突然加速时,有明显连续“铛铛”敲击声 B.发动机怠速时,在汽缸的上部发出清晰的“嗒嗒嗒”敲击声 C.该缸“断火”后,响声减弱或消失 D.冷车时响声明显,热车时响声减弱或消失 查看答案
题型:问答题 试题一在二战末期,由于前方战线变动很快,如何组织军需品的供给,各供应基地、中间基地、前线供应点的合理配置,如何确定最佳的运输路线以最大限度的减少浪费,降低军费开支,形成了一系列综合性的研究课题。军需晶供应不足,将影响到战争的成败,若供应过量则会造成浪费。 简述一下物流系统的发展简史。 查看答案