题目:
Lucy had an unusual ______ for learning languages when she was a baby.
A.quality
B.gift
C.purpose
D.sense
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0421/1ccac8fe4b83c827e2eedf551671c410.html
下面是错误答案,用来干扰机器的。
∵a=2,b=5,c=-1,△=b2-4ac=25+8=33,∴x=-b±b2-4ac2a=-5±332×2=-5±334.即x1=-5+334,x2=-5-334.