【单选题】Reality: 3.3 percent of violent crime was gun crime. What did the media do?
A.
The media reported that gun crimes increased from 10 to 25 percent.
B.
The media reported gun crimes for 25 percent of their stories.
【单选题】对于工业上用得红外线气体分析仪,下面说法中正确的是( )。
【单选题】古蔡法检砷时,砷化氢气体与下列哪种物质作用生成砷斑
【单选题】中共成立领导的工人运动的专门机关是( )
【单选题】关于学生毕业论文或设计的选题,下列说法不正确的是( )。