构成计算机电子的、机械的物理实体称为( )。A．计算机系统 B．计算机硬件系统 C

Structured programming practices (1) rise to Pascal, in which constructs were introduced to make programs more readable and better (2) . (3) provided a combination of assembly language and high-level structure to create a general-purpose language that could be used from system to application programming. Next came object orientation, which is (4) of a methodology and design philosophy than a language issue. This is (5) by the addition of so-called OO extensions to current languages, such as application.

（4）（）

A.more

B.little

C.amatter

D.important

现代电信网络通信分为______、______、______等．

中外合资旅行社的合营者共同投资、共同管理、共负盈亏、共担风险( )。

A．受我国法律管辖和保护，是中国法人
B．受外国法律管辖和保护，是外国法人
C．受第三国法律管辖和保护，是第三国法人
D．受国际条约管辖和保护，是中国法人

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

Is the triangle depicted above isosceles ？（） (Figure not necessarily drawn to scale.)

(1) 180°-(a+c)=60°

(2) a=2b-c

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

在牙齿发育阶段，如果饮用水中氟含量高于百万分之一，或经其他途径摄入过多的氟，可导致釉质形成不全和钙化不全的是( )

A．釉质发育不全
B．氟牙症
C．四环素牙
D．牙本质发育不全症
E．牙骨质发育不全症