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【单选题】
如下图所示电路已知 U S =3V,I S =2A ,则电路 中 U AB 为( )。A.
1V
B.
-1 V
C.
1.5 V
D.
-1.5 V
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举一反三
【单选题】It is implied in the text that higher infant mortality______.
A.
requires the U. S. to improve its poor healthcare
B.
shows the defect of the social system in the U. S.
C.
doesn't necessarily mean poor healthcare system
D.
fails to explain the flaw of a country's healthcare
【单选题】根据如下两个小麦品种的主茎高度的测量结果,可以判断( ) 品种 算术平均数(cm) 标准差(cm) 变异系数 极差(cm) 甲 95.0 9.02 9.5 15.3 乙 75.0 9.02 12.03 9.8
A.
甲品种比乙品种变异大
B.
甲品种比乙品种变异小
C.
因为他们的算数平均数不相等,无法判断那个品种变异大
D.
根据表中,S甲=S乙,甲品种与乙品种变异大小相等
【单选题】The higher infant mortality in the U. S. is primarily attributed to______.
A.
the birth of premature babies with poor health
B.
the undesirable habits teenagers easily fall into
C.
the faulty design of its private insurance system
D.
the higher proportion of adolescent pregnancies
【简答题】技术分析的基本要素是量、 、时、 。
【简答题】PPT软件的英文名称是什么? PPT是哪个公司的产品?
【单选题】Which of the following is true about the cost of software quality?
A.
It is higher in U. S. than in Japan.
B.
It is higher in Japan than in India.
C.
It is higher in India than in Brazil.
D.
It is higher in Brazil than in U. S.
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