题目

如果给你两块磁铁，你能否把他们两极之间的相互作用说出来？ 答案：（1）先在每个磁极上写上字母，一根上写A和B，另一根上写C和D。（2）依次试一试磁极间的相互作用。（3） “→←”箭头相对表示相互吸引， “←→”箭头相反表示相互排斥。单词拼写 56. If what you are teaching doesn’t a            to your students, they will lose interest in it. 57. The Hope Project is s              by wealthy big companies, who hope to advertise their       companies or their products. 58. The height of the mountains v             from 1000 meters to over 2000 meters. 59. Some students think so many tests every week make them under a lot of s              . 60. I behaved badly yesterday and I am a            of myself now. 61.The film is a           from a novel with the same name. 62. After s             the water out of the skirt, she hung it in the sun. 63. He a               for this job, but was refused. 64. He worked very hard and e              his effort paid off in College Entrance Exam. 65. As we all know, smoking has many harmful e           on both smokers and non-smokers.