【判断题】钻石激光打孔是利用钻石低热膨胀性和可燃性性质
【简答题】Bill Gates is a very ___________________ (success) businessman.
【简答题】Bill Gates, the founder of MICROSOFT was selected, in spite of the fact that he was only ranked at____________.
【多选题】钻石的激光切割和打孔净度处理技术就是利用了钻石的哪些性质
【单选题】是导游员宣传介绍本地文化的好时机,有利于旅游者对本地区的特点形成整体概 念,强化他们对本地的认知。