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问题

牛顿是近代自然科学的奠基人之一，他的贡献有             （   ）

A．提出神创论

B．发现万有引定律

C．提出进化论

D．提出相对论

答案

答案：B

本题考查的是牛顿的贡献。牛顿发现了万有引定律，故选B。

单项选择题

Object-oriented analysis(OOA)is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (71) . It determines how the various results are computed by the product and presents this information in the form of a (72) and associated scenarios. The second is (73) ，which determines the classes and their attributes. Then determine the interrelationships and interaction among the classes. The last step is (74) , which determines the actions performed by or to each class or subclass and presents this information in the form of (75) .

75（）

A．activity diagram

B．component diagram

C．sequence diagram

D．state diagram
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单项选择题

对检出转移性骨肿瘤最敏感且无假阳性的方法是（）

A.CT

B.MRI

C.X-ray

D.核素

E.DSA
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