【判断题】汽车铭牌有车型标志、产品标牌、发动机型号等信息
【单选题】无色孔雀石绿(结构简式如下图所示)曾被用作水产养殖业的杀虫剂(鱼药)。因为具有潜在致癌性,已被禁止用作鱼药。下列关于无色孔雀石绿的叙述中,正确的是 [ ]
D.
在一定条件下,1 mol无色孔雀石绿 可以和9 mol氢气发生加成反应
【单选题】There is less crime now than there used to be. It seems that there is a ______ in the crime rate.
【判断题】It seems that there is less distinction between a mainframe and a supercomputer.
【单选题】It seems that there is______ that I can't do.
【判断题】It seems that there is less distinction between a mainframe and a supercomputer.8.It seems that there is less distinction between a mainframe and a supercomputer.