题目内容
（请给出正确答案）
A.Avoidmakingexcuses。
B.Listentootherpeople’sadvice。
C.Makehisintensionspublic。
D.Haveotherswatchoverhisshoulder。
如果结果不匹配，请 联系老师 获取答案
更多“帮姐姐问一道英语四六级的英语考试选择题”相关的问题
While elderly people 47.to sleep for fewer hours than they did when they were younger, this has a 48.effect on their brain's performance and they would benefit from getting more, according to research.
"The ability to sleep in one chunk overnight goes down as we age but the amount of sleep we need to 52.____well does not change," Dr Drummond told the American Association for the Advancement of Science conference in San Diego.
A.ithascausednoharm。
B.itisclaimedtobeunintentional。
C.ithasgoneunnoticed。
D.itiscommittedwithgoodintentions。
The ____________ on this apartment expiresin a year’s time.
A) treaty B)lease
C) engagement D) subsidy
某学校进行一次英语测验，为了解学生的考试情况，随机重复抽选部分学生进行调查，得到如表7-1所示的资料。
.jpg)
根据学校规定，成绩达到80分以上为优秀，试以95.45%(t=2)的可靠性估计该校学生英语考试的平均成绩的范围及优秀率的范围。
根据上述资料请回答：
本题计算平均数应采用的公式为()。
1.jpg)
