当x∈(l,2),不等式(x-1)2<logax,则a的取值范围是( )。
(1,2)
I have just bought a big Christmas tree. It's _______ as tall as our room. [ ]
A. almost
B. near
C. only
D. hardly
实行拉伸、保持拉伸、再拉伸、再保持的方法的目的是什么()
A、确定拉伸的方向
B、让损坏板件充分放松应力
C、拉伸时有危险,修理人员要休息
D、消除板件的弹性变形