(选做题)若关于x的不等式|a|≥|x+1|+|x-2|存在实数解,则实数a的取值范围是( )。
投资补助项目具有的特点包括( )。
A.公益性
B.经营性
C.综合性
D.区域性
E.无偿性
----How do you find the concert in the Beijing Grand Theatre last night?
----_______.But the conductor was perfect.
A.I couldn’t agree more
B.I don’t think much of it
C.I was crazy about it
D.I really like it