有两个大小及重量都相同的空心球，但是，这两个球的材料是不同的，一个是金，一个是铅。这两个球的表面涂了一模一样的油漆，现在要求在不破坏表面油漆的条件下用简易方法指出哪个是金的，哪个是铅的。 　　你能分辨出来吗？

您可能感兴趣的试题

• 1 以前我爱打羽毛球。 ___________________________________________________________________
  点击查看答案进入在线练题题不想做，我帮你做
• 2那时候我不喜欢冬天。 __________________________________________________________________
  点击查看答案进入在线练题题不想做，我帮你做
• 3I was short, so I couldn’t ride my bike well. ____________________________________________________
  点击查看答案进入在线练题题不想做，我帮你做
• 4I’m very active in class. __________________________________________________________________
  点击查看答案进入在线练题题不想做，我帮你做
• 5There were no computers in my time. _______________________________________________________________
  点击查看答案进入在线练题题不想做，我帮你做
• 6One day I’m going to visit the moon. _____________________________________________________________
  点击查看答案进入在线练题题不想做，我帮你做
• 7（      ）People in Tang dynasty _________ use the planes.

  A.can      B.could      C.couldn’t
  

  点击查看答案进入在线练题题不想做，我帮你做
• 8（      ）I went to Beijing _______.

  A.tomorrow   B.last month     C.today
  

  点击查看答案进入在线练题题不想做，我帮你做
• 9（      ）There were _______gyms then.  

  A.no     B.not      C.isn’t
  

  点击查看答案进入在线练题题不想做，我帮你做
• 10（      ）There is a __________ hall in my school now.

  A.dine    B.dining    C.dinner
  

  点击查看答案进入在线练题题不想做，我帮你做