Boy: Is the dinosaur taller than the building?
Girl: No, it isn't.
A:
B:
Alan is as as Lucy in their class.
下列有关菌落的描述,正确的是( )
已知x,y满足约束条件x-y+6≥0x≤3x+y+k≥0,且z=2x+4y的最小值为6.若实数x∈-32,3y∈0,9则点px,y落在上述区域内的概率为( )
“人间四月芳菲尽,山寺桃花始盛开”,在这句诗中主要影响桃花开放的生态因素是( )