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问题 选择题

下图为欧洲1月等温线分布图，据此完成第1~2题。

1、图中甲、乙、丙三地等温线出现了较大的弯曲，下列原因解释不正确的是 [     ]

A、洋流

B、地形

C、海陆差异

D、自然带差异

2、2010年12月，甲地出现了往年不常见的连续暴风雪天气，导致这种天气的根本原因是 [ ]

A、西风带势力增强

B、极地冷湿气流强烈南下

C、蒙古高压控制

D、冰岛低压控

答案

1、D

2、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

正常膳食时，钙从尿中排出量约为摄入量的（）

A.10％

B.20％

C.30％

D.40％

E.50％
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