4B/5B编码是一种两级编码方案，首先要把数据变成（44）编码，再把 4位分为一组的

非甾体抗炎药引起的消化性溃疡，不能停用非甾体抗炎药时首选（）。

A.米索前列醇

B.法莫替丁

C.依沙必利

D.氢氧化铝

E.奥美拉唑

There is nothing in this world constant but inconstancy. —SWIFT Project after project designs a set of algorithms and then plunges into construction of customer-deliverable software on a schedule that demands delivery of the first thing built.

In most projects, the first system built is(1)usable.It may be too slow, too big, awkward to use, or all three. There is no(2)but to start again, smarting but smarter, and build a redesigned version in which these problems are solved. The discard and(3)may be done in one lump, or it may be done piece-by-piece. But all large-system experience shows that it will be done.Where a new system concept or new technology is used, one has to build a system to throw away, for even the best planning is not so omniscient （全知的） as to get it right the first time.

The management question, therefore, is not whether to build a pilot system and throw it away. You will do that. The only question is whether to plan in advance to build a(4), or to promise to deliver the throwaway to customers. Seen this way,the answer is much clearer. Delivering that throwaway to customers buys time, but it does so only at the(5)of agony（极大痛苦） for the user, distraction for the builders while they do the redesign, and a bad reputation for the product that the best redesign will find hard to live down. Hence plan to throw one away; you will, anyhow.

空白（1）处应选择（）。

A.almost

B.often

C.usually

D.barely

青藏高原夏季气温比长江中下游低许多，其主要原因是（）

A.纬度位置的影响

B.地势高低的影响

C.海陆位置的影响

D.河流多少的影响

用来增强或扩展电视机功能的信息设备是（）

完善的公司法人治理结构可以实现依法最大限度地保护公司股东权益。（）