据《素问·上古天真论》的内容，现代人“半百而衰”的原因包括（） A.以酒为浆 B.醉

冰醋酸中加水稀释时，溶液中的氢离子浓度随加入的水量变化的下列各曲线图中，正确的是[ ]

A.

B.

C.

D.

伸大腿、屈膝的肌是（）。

A.股薄肌

B.长收肌

C.短收肌

D.大收肌

E.股二头肌

System analysis is traditionally done top-down using structured analysis based on (1). Object-oriented analysis focuses on creation ofmodels. The three types of the analysis model are (2). There are two substages of object-oriented analysis. (3) focuses on real-world things whose semantics the application captures. The object constructed in the requirement analysis shows the (4) of the real-world system and organizes it into workable pieces. (5) addresses the computer aspects of the application that are visible to users. The objects are those which can be expected to vary from time to time quite rapidly.

空白（5）处应选择（）

A.Program analysis

B.Function requirement

C.Application analysis

D.Physical model

( )发生在当事人已经有实际支付标的物或价金的场合。

A．折价补偿

B．赔偿损失

C．返还财产

D．追缴财产

行为人的代理权已经终止，但被代理人未通知客户，致使合同暂时无法履行，该合同称为（）合同。

A、无效合同

B、无代理权的合同

C、可撤销合同

D、表见代理合同