能用于做吸潮剂的是（）
A.生石灰
B.熟石灰
C.铁粉
D.维生素C
参考答案：A
---- I’m so sorry that I made your computer stop working.
---- _______. I can repair it myself.
A．No big deal.
B．Don’t say that.
C．Not at all.
D．Of course not.
已知：a为有理数，a3+a2+a+1=0，求1+a+a2+a3+…+a2012的值。
