当前流行的计算机系统中，广泛采用由三种运行原理不同、性能差异很大的存储介质来构建计算

“三一”砌筑法就是（）、一块砖、一揉压的砌法。

患者女，56岁，右下肢静脉迂曲扩张20年，伴下肢酸胀，水肿，活动抬高减轻，近2年右足靴区皮肤发红，时有瘙痒，逐渐加重，查体：右下肢大腿内侧，小腿后迂曲扩张之静脉团，足靴区色素沉着，皮肤变厚。该患者属于（）

A.下肢静脉回流障碍疾病

B.下肢静脉倒流性疾病

C.动静脉瘘

D.静脉瘤

E.以上都不是

钻孔灌注桩施工中，制备泥浆的主要作用有()

A.冷却钻头

B.润滑钻具

C.浮悬钻渣

D.防止坍孔

E.减少孔内静水压力

合同生效后，价款或者报酬不明确的，也无法通过其他方法确定，可以按照 ( )价格履行。

A．订立合同时订立地的市场
B．履行合同时履行地的市场
C．履行合同时订立地的市场
D．订立合同时履行地的市场

OOP languages that create objects, such as (1) and (2) are beginning to take hold as viable tools for programmers. To effectively reuse objects, programmers need a place to store them such as an ODBMS or a RDBMS with object oriented extensions.
Databases that handle object data not only let user store and retrieve (3) data, but also let them store objects created by OOP languages, to facilitate rapid software development and reuse, and let them (4) new multimedia applications combining multiple data types.
RDBMS vendors have developed new extensions to existing DB technology to accommodate the most common forms of (5) data.

A．C++

B．SMALLTALK

C．PASCAL

D．C