题干
. Either you or the headmaster ______ the prizes to the gifted students.
A：is handing out
B：are to hand out
C：are handing out
D：is to hand out
答案(点此获取答案解析）
D
CO(g)+H2(g)。CO(g)的平衡物质的量浓度c(CO)与温度T的关系如右图所示。下列说法错误的是