已知2a+1的平方根是±3，3a+2b﹣4的立方根是﹣2，求4a﹣5b+8的立方根．
解：∵2a+1的平方根是±3，3a+2b﹣4的立方根是﹣2，
∴2a+1=9，3a+2b﹣4=﹣8，
解得a=4，b=﹣8，
∴4a﹣5b+8=4×4﹣5×（﹣8）+8=64，
∴4a﹣5b+8的立方根是4．
— The match is so exciting. The opposite team is really strong.
— You’re right. But I am sure our team will win!
—I do more exercise and eat _________ meat than I did last year.
—That's why you're getting thinner.
医生在发烧病人身上擦酒精溶液，可以达到降低体温的效果。他的依据是（ ）
