if the average of the consecutive even integers a,b, and c is less than 13a, which of the following best describes the value of a?
答案: a is positive
为什么呢?
解答:
点赞0
阅读246358
解答:
sysadmin
提问:
@Tina老师,老师,这道题帮忙讲一下b和c选项呗。主要区别在谓语单复数和后面的to provide 还是providing。主语是两个不可数名词and并列,谓语要用复数么?