Nobody knows ______ yesterday.
A:how the accident happens
B:how does the accident happen
C:how the accident happened
D:how did the accident happen
设f(x)=2ex-1,x<2log3(x2-1),x≥2,则不等式f(x)>2的解集为 ( )
64÷8=____
水浇地是指除水田、菜地外,有水源保证和灌溉设施,在一般年景能正常灌溉的耕地。“望天田”是指无水源保证和灌溉工程设施,主要依靠天然降雨种植水生作物的耕地。下图为我国部分省份耕地利用结构。关于图示各省份耕地结构的说法,正确的是( )