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【判断题】
两个同型矩阵等价的充要条件是它们具有相同的秩A.
正确
B.
错误
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【单选题】在导致疾病的发生过程中,某因素可引发该病,即当该病存在时该因素必需存在,但该因素也并非总是单独引发该病,另需其他因素参与才能致病,这种因素称为
A.
必要病因
B.
充分病因
C.
完全病因
D.
非完全病因
E.
间接病因
【简答题】Generally , a single word possesse s both _______ and implied meanings, and the relations between two lexical expressions in two different cultures for one meaning include: semantic correspondence, se...
【单选题】在导致疾病的发生过程中,某因素可引发该病,即当该病存在时该因素必需存在,但该因素也并非总是单独引发该病,另需其他因素参与才能致病,这种因素称为
A.
必要病因
B.
充分病因
C.
完全病因
D.
非完全病因
E.
.局部病因
【单选题】By 'common resources' (Paragraph 2), the author means that ______.
A.
the resources possessed by the United States should be shared by other countries
B.
Americans have the right to consume resources both from their home country and from abroad
C.
it is difficult to distinguish the resources possessed by America from those possessed by other countries
D.
all the resources in the world should be shared by all the countries
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