She requested him with her. [ ]
A. go
B.going
C.goned
D.to go
答案:D
若函数f(x)=x3+ax2+bx-7在R上单调递增,则实数a,b一定满足的条件是( )
A.a2-3b<0
B.a2-3b>0
C.a2-3b=0
D.a2-3b<1
史称其风声气节,足以激贪而厉俗。 激:()厉:()