题型：判断题 某学校在原校园网的基础上进行网络改造，网络方案如图所示。其中网管中心位于办公楼第三层，采用动态及静态结合的方式进行IP地址的管理和分配。 【问题3】 为图中(6)～(9)处选择介质，填写在相应位置。 备选介质(每种介质限选一次)： 千兆双绞线 百兆双绞线 双千兆光纤链路 千兆光纤 查看答案
题型：判断题 EASTGATES·YANGZHOURollerworld is a public skating rink（旱冰场）that welcomes everyone from beginners to experts.NOTICE— under 12’s must be taken care of by an adult（成人）— small fee（费用） for adults watching children— no dirty or dangerous skates— dress must be neat— no jackets, hats or open clothing to be worn— no newspapers, books, magazines, games allowed in Roller Café or Roller Bar— no smoking except in Roller Bar and smoking room of Roller Café— over 18’s only in Roller Bar “Roller skating fun for everyone”小题1:From the poster（海报）we know Rollerworld can only be visited by people _____.A．who can roller skate wellB．who are over eighteenC．who are neatly dressedD．who are learning how to roller skate小题2:If a 10-year-old boy wants to skate in Rollerworld, his parent _____.A．is allowed to watch him for freeB．should look after himC．can take him to the Roller BarD．can read while waiting in the Roller Bar小题3:Where can people smoke?A．In any place in the Roller Café.B．At the skating rink.C．Nowhere in Rollerworld. D．In the Roller Bar.小题4:What is “ROLLERWORLD”?A club for skatingB.A place for swimming C.A place for dancingD.A place for playing computer games小题5:The following which is right?A．It’s free for adults watching TVB．All people can go to Roller Bar.C．You can smoke anywhereD．Your dress must be neat 查看答案
题型：判断题 有3个反应：①Cl2+2KBr=2KCl+Br2 ②KClO3+6HCl=3Cl2+KCl+3H2O③ 2KBrO3+Cl2=Br2+2KClO3，下面说法正确的（ ）A．上述三个反应都有单质生成，所以都是置换反应B．反应②中还原剂与氧化剂的物质的量之比为6：1C．反应③中1mol Cl2反应，则氧化剂得电子的物质的量为10molD．氧化性由强到弱的顺序为：KClO3>KBrO3>Cl2>Br2 查看答案
