商用房贷款中，银行通常规定每笔贷款只可以展期一次，展期期限不得超过( )。 A．半年

伤寒恢复期

A.伤寒第一次菌血症

B.伤寒第二次菌血症

C.伤寒肠道并发症

D.伤寒后再燃

E.伤寒后复发

以下是系统设计应该遵循的基本原则的描述。 Ⅰ．可以根据具体缺点随意更改系统功能和性能要求 Ⅱ．权衡系统的投资和效益的比例 Ⅲ．保证系统的效率和质量 Ⅳ．体现系统的可扩展性和可适应性 Ⅴ．追求利用先进的技术设计系统 其中正确的有( )。

A．Ⅰ、Ⅱ、Ⅲ

B．Ⅲ、Ⅳ、Ⅴ

C．Ⅰ、Ⅲ、Ⅳ

D．Ⅱ、Ⅲ、Ⅳ

简述古代学校教育的特征。

All known techniques for handling complex problems successfully seem to fall into one of the three classes: subdividing the problem (51) , ignoring irrelevant detail in a safe way (52) , and having an independent agent (53) the internal consistency (contextual checking). The first two provide guidelines for solving the problem, the third serves to provide early warnings. A good programming language supports all three.
In subdividing problem, some of the subproblems may be similar to the (54) problem. It leads us to a (55) solution. This (55) solution is viable provided each of the subproblems is easier to solve than the original problem.

A．abrogation

B．abstraction

C．composition

D．contraction

简述外资企业的主要特征。