写一个系数为负数,含字母x、y的五次单项式,这个单项式可以为(). 发布时间:2017-05-24 22:09 │ 来源:www.tikuol.com 题型:填空题 问题: 写一个系数为负数,含字母x、y的五次单项式,这个单项式可以为( ).
题型:填空题 Most of the students feel nervous when they are reminded that it will be about half a year ____ they take the national college entrance examination. [ ]A. since B. that C. before D. until 查看答案