皮皮学，免费搜题
登录
搜题
【单选题】
下图的填方路基边坡坡度为()。A.
1:1
B.
1:1.5
C.
1:2
D.
2%
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】Child mortality (死亡率) decreased due to improvements in medical care and greater attention to problems related to proper ________.(gigantic; standpoint; evacuate; naïve; permeate; nutrition; inflict; s...
【简答题】Liam works in Sydney. Last week he had 41 holiday, but he didn’t know 42 to go. He said to his friend Robert, “I 43 the hot weather here, but I can’t find a cool place in Australia. How will I spend m...
【单选题】Child mortality (死亡率)decreased due to improvements in medical care and greater attention to problems related to proper________.
A.
resident
B.
massacre
C.
convict
D.
nutrition
【简答题】简述随机抽样与非随机抽样的含义及各自具体包含哪些抽样方法。
【单选题】How does Will feel in his last times from the passage? (from P.470-476)
A.
He looks anxious and guilty
B.
He is pretty composed and relaxed
C.
He feels pressured and reluctant
【简答题】Whether he will invest his last sum in that project is a case of _____ or swim for him.
【简答题】设随机变量X和Y的相关系数为0．9，若Z＝X－0．4，则Y与Z的相关系数为________．
【单选题】He is not easy-going, but his trust in his friends will last forever once _______.
A.
to be gained
B.
is gained
C.
being gained
D.
it is gained
【单选题】将总体中的全部个体区分为容量及结构相似的不同的子总体,以子总体为单位按照简单随机抽样的方法抽取一定数量的子总体,再将这些被抽中的子总体中所包含的个体合并起来形成最终的样本,这种抽样方法称作
A.
分层抽样
B.
系统抽样
C.
简单抽样
D.
整群抽样
相关题目：
参考解析：
知识点：
题目纠错 0
发布
