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【单选题】
如果变量x和变量y之间的相关系数为-1,这说明两变量之间是( )。A.
强相关关系
B.
完全相关关系
C.
低度相关关系
D.
完全不相关
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【单选题】通常用“人财物 产供销”这六个字来描述一个企业所需的要素和企业的主要活动,其中业务计划的内容涉及:
A.
财、产 、供 、销；
B.
财 、物、 产 、供；
C.
财、 产、 供 、销；
D.
物 、产、 供、 销；
【简答题】On 1 May 2018, Rafe started to invest in rented properties using capital inherited from his grandfather. He bought two houses in the first three months, as follows. House 1 Rafe bought house 1 on 1 Ma...
【简答题】He bought two _______(dozen) eggs yesterday.
【单选题】He bought two pens.One is for his son,and___ is for his daughter.
A.
the other
B.
another
C.
others
D.
other
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【单选题】Last year Leo bought two paintings. This year he sold them for $2000 each. On one, he made a 25% profit, and on the other he had a 25% loss. What was his net loss or profit?
A.
He broke even.
B.
He lost less than $100.
C.
He lost more than $100.
D.
He earned less than $100.
E.
He earned more than $100.
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