下列操作系统中从( )开始是32位的操作系统。A．Windows 2.0 B．Wi

疳肿胀的治法是（）

A.利水消肿

B.淡渗利湿

C.温阳利水

D.健脾化湿

E.疏风利水

有三个关系R、S和T如下：

由关系R和S通过运算得到关系T，则所使用的运算为

A．笛卡尔积

B．交

C．并

D．自然连接

在某建设项目施工中形成的下列债权中，属于合同之债的有()。

A、施工单位与材料供应商订立合同

B、施工现场的砖块坠落砸伤现场外的行人

C、施工单位将本应汇给甲单位的材料款汇入了乙单位账号

D、材料供应商向施工单位交付材料

E、施工单位向材料供应商支付材料款

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．cost-oriented

B．application-oriented

C．efficiency-oriented

D．consumption-oriented

什么叫侵染性病害、非侵染性病害、潜育期？