不属于宋元讲史话本的作品是（）。 A.《简帖和尚》 B.《新编五代史平话》 C.《三

一本240页的书，小红第一天看了20%，第二天看了30%，两天一共看了多少页？

一对正负电子相遇后转化为光子的过程被称之为湮灭. ①静止的一对正负电子湮灭会产生两个同频率的光子，且两个光子呈180°背道而驰，这是为什么？②电子质量m=9.1×10^-31kg，真空中光速c=3×10⁸m/s，普朗克恒量为h=6.63×10^-34J·s，求一对静止的正负电子湮灭后产生的光子的频率（结果保留两位有效数字）．

用超过60字的一句话概述下面两段文字的主要内容。

杨朔的散文好就好在他真诚地关心祖国和人民的命运，拥抱现实，感悟人生，又是那样如诗如画，达到很高的境界，所以才在读者中具有巨大的感染力，而且经久不衰，这难道不是事实吗？

杨朔把蜂房说成"养蜂大厦"，把50年代末60年代初的三分天灾、七分人祸的困难时期的情形，说成是社会主义祖国"最新最美的画卷"。无怪有人说，对当时严重的"左"的错误，一些握笔者也应负有一定责任。

Information systems design is defined as those tasks that focus on the specification of a detailed computer-based solution. Typically, there are four systems design tasks for in-house development.

1) The first task is to specify (71) ,which defines the technologies to be used by one, more, or all information systems in terms of their data, processes, interfaces, and network components. This task is accomplished by analyzing the data models and process models that are initially created during requirements analys16.

2) The next systems design task is to develop the (72) . The purpose of this task is to prepare technical design specifications for a database that will be adaptable to future requirements and expansion.

3) Once the database prototype has been built, the systems designer can work closely with system users to develop input, output and dialogue specifications. The (73) must be specified to ensure that the outputs are not lost, misrouted, misused, or incomplete.

4) The fourth design task involves packaging all the specifications from the previous design tasks into a set of specifications that will guide the (74) activities during the following phases of the systems development methodology.

Finally, we should (75) and update the project plan accordingly. The key deliverable should include a detailed plan for the construction phase that should follow.

（74）处应填（）。

A．system administrator’s

B．system analysts

C．computer programmer’s

D．system designer’s

片重在0.3g或0.3g以上的片剂其重量差异限度为（）

A.±7.5%

B.±5.0%

C.±0.5%

D.7.5%

E.5.0%