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问题 单项选择题

概念结构设计的目标是产生数据库概念结构(即概念模式)，这种结构主要反映______。

A．DBA的管理信息要求

B．应用程序员的编程需求

C．企业组织的信息需求

D．数据库的维护需求

答案

参考答案：A

读图填空题

如图将芽的发育用线连接起来，并填写名称。

A________①________
B________②________
C________③________
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单项选择题

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.

In isosceles triangle ABC, what is the value of ∠C ？（）
(1) The measure of ∠B is 47°
(2) The measure of ∠A is 90°

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.
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