单用户数据库管理系统与多用户数据库管理系统之间的最明显的也是最重要的差别是:是否支持多个用户______数据库。
A.查询
B.定义
C.修改
D.共享
参考答案:D
患者男,28岁,因皮肤黏膜出血,发热10d入院。查体:贫血貌,皮肤可见瘀点和瘀斑,胸骨压痛(+),肝、脾肋下未及,外周血象:WBC33.54×109/L,Hb75g/L,PLT31×109/L,血涂片检查发现原始(幼稚)细胞。
为髓细胞系分化抗原的是(提示MPO染色阳性,氯乙酸AS-D萘酯酶染色阳性,α-乙酸萘酯酶(α-NAE)染色阳性,不被NaF抑制,结合细胞形态,诊断为急性早幼粒细胞白血病(M3),进一步做白血病免疫分型。)()
A.CD15
B.CDl0
C.CD19
D.CD13
E.CD3
F.CD33
Embedded system is (66) special computer system which is scalable on both software and (67). It can satisfy the strict requirement of functionality, (68) , cost, volume, and power consumption of the particular application. With rapid development of (69) design and manufacture, CPUs became cheap. Lots of (70) electronics have embedded CPU and thus became embedded systems. For example, PDAs, cellphones, point-of-sale devices, VCRs, industrial robot control, or even your toasters can be embedded system.
A.variability
B.security
C.reliability
D.responsibility