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MIDI enables people to use (51) computers and electronic musical instruments. There are actually three components to MIDI, the communications " (52) ", the Hardware Interface and a distribution (53) called "Standard MIDI Files". In the context of the WWW, the most interesting component is the (54) Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol (55) are stored in MIDI files, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today. （53）是（）

A. format
B. text
C. wave
D. center

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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. （36）是（）

A. function
B. definition
C. model
D. statement

一个种群的年龄锥体呈下宽上窄的金字塔形，则该种类的年龄结构属于（）

A. 稳定型
B. 增长型
C. 衰退型
D. 混合型

论述题什么是初级生产力？论述影响陆地生态系统初级生产力的因素及提高陆地生态系统初级生产力的途径。

(1)建立账套。为广源工厂建立一套新账，启用日期为2009年1月，账套主管为李伟，账套号为886，增加操作人员王明、李伟，密码统一为1。 (2)建立科目，并录入期初余额(见下表)。期初余额表单位：元科目编号科目名称贷方余额贷方余额 1001 库存现金 1000.00 1002 银行存款 1406 000.00 100201 工行存款 1392 800.00 100202 中行存款 13200.00 1122 应收账款 1470000.00 1221 其他应收款 7300.00 1403 原材料 1000000.00 140301 8.5圆钢 1000 000.00 2001 短期借款 900000.00 2202 应付账款 1070000.00 4001 实收资本 1914 300.00 6001 主营业务收入 6002 管理费用合计 3884300.00 3884300.00 (3)编制记账凭证。由操作员王明根据下列经济业务编制凭证：第一，1月4日，购入8.5圆钢90吨，每吨3300元(假设无税)，款未付。借：原材料——8.5圆钢(140301) 297000 贷：应付账款(2202) 297000 第二，1月5日，销售给非凡公司产品一批，价格160000元(假设无税)，款未付。借：应收账款(1122) 160000 贷：主营业务收入(6001) 160000 第三，1月6日，用工行存款归还短期借款600000元。借：短期借款(2001) 600000 贷：银行存款——工行存款(100201) 600000 第四，1月7日，李明报销差旅费1000元，冲销其他应收款。借：管理费用(6602) 1000 贷：其他应收款(1221) 1000 第五，1月8日，提取库存现金16000元准备发放工资。借：库存现金(1001) 16000 贷：银行存款——工行存款(100201) 16000 (4)由操作员李伟审核凭证、记账、结账。 (5)编制会计报表。根据下表格式编制资产负债表，并从账上提取“货币资金”、“应收账款”、“短期借款”数据。资产负债表编制单位：广源工厂 2009年1月31日报表编号：会工01表资产期末余额年初余额权益期末余额年初余额流动资产：流动负债：货币资金短期借款应收账款应付账款资产总计权益总计