根据Step 2中的第一句“Tet themagnetised needle with the spare needle to see if it canpick t up."可知,用备用针测试磁化的针,看看这个磁化的针能不能把备用吸起来,即备用针是用来检查另一根针是否被磁化的。故选D。2B推理判断题。根据Step3中的最后一句Then, at the bottom end of the hanging string...
Fun School Projects with Magnets and MetalScience is one of the most interesting and fun subjects for kids. There are endless opportunities for practical experiments that are sure to surprise and excite children's imaginations. A great way to get into experimenting with science is with the use ...
Besides styles and trends, Craigie talks about the trends of society that helped initiate the changes of social influencing and the various words and taglines which also evolved along with the progression of time. From the wild wear and hair of the 70s to the broad shoulder padded outfits of ...