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【单选题】
由总体的全部观察值而算得的总体特征数称为A.
平均数
B.
均方
C.
方差
D.
参数
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反馈参考答案：
举一反三
【单选题】The population increase in cities reached a new (peak) in Asia and Africa.
A.
泄露；漏洞
B.
对电脑痴迷的人
C.
高峰，顶点；山峰，山顶；达到最大值
【简答题】The developing countries in Asia，Africa and Latin America ______ the third world． 亚洲、非洲和拉丁美洲的发展中国家构成了第三世界国家。
【简答题】The developing countries in Asia, Africa and Latin America make up the third world.
【判断题】In Asia, Africa and Latin America, prolonged eye contact is viewed as polite.
A.
正确
B.
错误
【判断题】It is hoped that a global infrastructure network can be created by connecting all sub-regions in Asia, and between Asia, Europe and Africa.
A.
正确
B.
错误
【简答题】阅读理解。 A People all over the world eat rice. Millions of people in Asia, Africa and South America live on it. Some people eat almost nothing but rice. Rice is a kind of grass. There are more than 7,000...
【单选题】如果货物适用不附加也不附减等级货物运价,须在航空运单的商品项目编号栏(Commodity Item No.)填写( )。
A.
N100
B.
N
C.
S
D.
S100
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