银行卡换卡，代收水费签约失效，需重新签约。（）

若把抛物线y=x²-2x+1向右平移2个单位，再向下平移3个单位，得到抛物线y=x²+bx+c，则 [ ]

A．b=2，c=-2

B．b=-6，c=6

C．b=-8，c=14

D．b=-8，c=18

诗句默写填空。

　　儒家经典让我们获益匪浅。《论语》中的“三人行，____________”，启发我们虚心取人之长；《孟子》中的“故天将降大任于是人也，____________，劳其筋骨”，教会我们坦然面对人生。

It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question. （） is a means to capture ideas, relationships, decisions, and requirements in a well-defined notation that can be applied to many different domains. Modeling not only means different things to different people, but also it can use different pieces of UML depending on what you are trying to convey. In general, a UML model is made up of one or more （） . A diagram graphically represents things, and the relationships between these things.These （） can be representations of real-world objects, pure software constructs, or a description of the behavior of some other objects. It is common for an individual thing to show up on multiple diagrams; each diagram represents a particular interest,or view, of the thing being modeled.UML 2.0 divides diagrams into two categories: structural diagrams and behavioral diagrams. （） are used to capture the physical organization of the things in your system, i. e. , how one object relates to another. （） focus on the behavior of elements in a system. For example, you can use behavioral diagrams to capture requirements, operations, and internal state changes for elements.

（） are used to capture the physical organization of the things in your system, i. e. , how one object relates to another.

A．Activity diagrams

B．Use-case diagrams

C．Structural diagrams

D．Behavioral diagrams

股份公司通过证券交易所交易系统采用上网资金申购方式公开发行股票。

国资委提出，到2010年，通过中央企业之间调整和重组，将现有的中央企业减少到80到100家，并培育出30至50家具有国际竞争力的大企业集团。要培育出具有国际竞争力的大企业集团，最重要的是（）

A.实行企业兼并和强强联合

B.重视科技创新，形成自主品牌

C.面向市场，生产适销对路的产品

D.遵守职业道德，诚信经营