已知a,b互为相反数,c,d互为倒数,x的绝对值为2.求x2-(a+b+cd)x 发布时间:2017-04-04 22:05 │ 来源:www.tikuol.com 题型:解答题 问题: 已知a,b互为相反数,c,d互为倒数,x的绝对值为2.求x2-(a+b+cd)x+(-cd)2011的值.
题型:解答题 According to the passage, what is NOT true about the first study().A.More than 1,000 people took part in the study.B.People who slept less had higher blood levels of ghrelin.C.People who slept more had higher blood levels of leptin.D.The amount of exercise can influence the result of the study. 查看答案