—______. I thought they might cheer you up.
A：That's right
B：All right
C：I'm all right
D：It's all right
middle, tall, high, short, a little
It's reported that the passenger ship "Eastern Star" capsized and sank（翻沉) in the Yangtze River _____ June 1st, 2015.
已知命题p:∀x∈R,cosx≤1，则¬p是（ ）
下列物质中属于氧化物的是（ ）
