已知抛物线C1：x2=2y的焦点为F，以F为圆心的圆C2交C1于A，B，交C1的

先口算，再统计。 9+9= 15-2= 14-8= 13-0= 12+6= 13+5= 10+8= 2+11= 19-10= 5+8= 19-1= 16-3= 6+7= 3+3= 10-4=

上面的算式中，得数是18的算式有（    ）道，得数是13的算式有（    ）道，得数是9的算式有（    ）道，得数是6的算式有（    ）道。

(一)
某城市给水工程项目，该工程项目属大中型工程项目，施工之前，项目监理机构编制了施工组织设计，设计单位组织有关单位对施工图设计会审，施工单位作了技术交底，建设单位对施工单位进行了施工技术交底。
在施工过程中，监理单位及时编制了施工技术文件，并按《建设工程文件归档整理规范》(CB/T 50320)的要求进行归档。
问题

逐一指出背景材料中的不妥之处，并改正。

拍卖房产贷款的还款方式不包括（）

A.等额本金还款法

B.贷款一年以内可用一次还本付息及按月还息、到期还本

C.宽限期还款法

D.等额本息还款法

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (36) of the technical requirements for the software product.

During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each (37) that it must meet. The starting point is usually a set of high-level requirements from the (38) that describe the project or problem.

In either case, the requirements definition team formulates an overall concept for the system and then defines (39) showing how the system will be operated, publishes the system and operations concept document, and conducts a system concept review (SCR).

Following the SCR, the team derives (40) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis the team specifies the software functions and algorithms needed to satisfy each detailed requirement.

（39）是（）

A.rules

B.principles

C.programmer

D.scenes

真空接触器在分断电感性负载时，由于其过强的灭弧能力，会引起（）。

A.不易分断

B.弧光延长

C.断开迅速

D.操作过电压