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问题 选择题

如图所示，空间有一电场．电场中有两个点a和b，下列表述正确的是（　　）

A．该电场是匀强电场

B．a点的电场强度比b点的大

C．b点的电势比a点的高

D．正电荷在a，b两点受力方向相同

答案

A、该电场的电场线疏密不同，场强不同，不是匀强电场．故A错误．

B、a点的电场线比b点密，所以a点的场强大于b点的场强．故B正确．

C、沿电场线方向电势逐渐降低，知a点的电势大于b点的电势．故C错误．

D、a、b两点的场强方向不同，则电荷在a、b两点所受电场力方向不同．故D错误．

故选：B．

选择题

银监会表示，2003年全国信用卡总量尚不足百万张；到2011年底，中国大陆地区信用卡累计发行量已达2.85亿张。八年来，总卡量增长了284倍。据此回答题：

小题1:信用卡作为电子货币的一种，在使用过程中执行的是货币的        职能

①一般等价物       ②流通手段     ③贮藏手段      ④支付手段

A．①②

B．①③

C．②④

D．③④小题2:消费者使用信用卡

①可以提高支付结算效率      ②可以减少现金流通，增强消费安全

③方便购物消费             ④能集存款、取款、贷款、消费、结算、查询为一体

A．①②

B．③④

C．①③④

D．①②③④
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单项选择题

A project management technique that is currently in widespread use is the (66) . The purpose of this technique is to detail, in hierarchical fashion, all of the activities that are required to meet project objectives. There are some special activities called (67) , which are events that signify the accomplishment or completion of major deliverables during the project. Most system development methodologies also provide (68) , whose purpose is to contain the various pieces of relevant information - feasibility assessments, schedules, needs analysis, and so forth - in a single place so that they can be presented to project clients and other related parties. Several types of important network diagrams are used in project management. (69) was developed to make clear the interdependence between project tasks before those tasks are scheduled. (70) offers the advantage of clearly showing overlapping tasks.

A. CPM B. Network Diagram
C. PERT D. Gantt chart
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