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.
(3)是()
A.C++
B.BASIC
C.PASCAL
D.structured
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关于骨的叙述中,下列哪一项是错误的()
A.新鲜的致密骨由9%的水、22%的有机质及69%的无机盐组成
B.骨皮质是由骨膜和矿物质组成的,骨髓质由规则排列的骨小梁组成
C.骨的无机盐成分主要是碱式磷酸钙
D.骨有机质是由10%的非胶质物及90%胶纤维组成的
E.长骨全部是由其骺板生长而成的
患者,女,20岁。诉咀嚼无力2年余。口腔检查:双侧下颌第一恒磨牙近远中牙周袋约8mm深,牙齿松动Ⅱ度,口腔卫生尚佳,下前牙牙石(+),松动Ⅱ度。拟诊()
A.侵袭性牙周炎
B.慢性龈炎
C.慢性牙周炎
D.青春期龈炎
E.以上均不对
30dBm+30dBm=()。
目前临床上多巴胺用于()
A.急性肾功能衰竭,抗休克
B.心脏骤停,急性肾功能衰竭
C.支气管哮喘,抗休克
D.Ⅱ、Ⅲ度房室传导阻滞,急性心功能不全
E.支气管哮喘,急性心功能不全
工业汽轮机按冲动方式分类,有()。
A、单级式
B、凝汽式
C、背压式
D、冲动式