A:④①②③
B:①④③②
C:②①④③
D:①②③④
已知函数f(x)=(12)x-1,x≤0ln(x+1),x>0,若f(x)≥ax,则实数a的取值范围为( )
把泡沫塑料压入水中,一松手,为什么它会上浮?等到浮在水面上之后,泡沫塑料块为什么不再向上冒?
A. I can't find my book.
B. Read the newspapers to old people.
C. Over there.
D. Because we can reuse them.
E. Yes.