Why doesn't the woman choose the black dress?
A:It is too big.
B:She is afraid to be hot in it.
C:She doesn't like the color.
—Excuse me, sir, visiting hours are over. You leave.
—Pardon me, nurse. I didn't hear the bell.
甲地因森林火灾使原有植被消失,乙地因火山喷发被火山岩全部覆盖,之后两地均发生了群落演替。关于甲、乙两地群落演替的叙述,错误的是
在Rt△ABC中,∠C=90°,tanA=2,则sinB=( )