操作系统的安全措施可以从隔离方面考虑。以下哪一个不是隔离的措施A．物理隔离 B．逻辑

生物所以具有遗传现象。是因为在传种接代过程中，传给后代的是（　　）

Ａ、细胞质　　Ｂ细胞核　　Ｃ、性状　　　Ｄ、控制性状的基因

As we all know, many Chinese words have come into English, ______ typhoon, tofu and kung fu.

A．for example

B．that is

C．such as

D．so as to

患者女性，24岁，临床诊断胰岛素依赖型糖尿病，于胰岛素治疗后，病人经常于清晨3～4点出现手抖，大汗，饥饿感，空腹血糖11mmol/L，尿糖4+，尿酮体4+，夜间尿糖阴性，应采取的措施是

A．减少睡前低精蛋白胰岛素用量

B．增加睡前低精蛋白胰岛素用量

C．加用双胍类药物

D．减少晚餐的热量

E．后夜加餐

(41) is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group.
(42) is an error detection code that most data communication networks use.
(43) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information.
(44) is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non-periodic basis over a range of media.
(45) is an identifier of a web page.

A．OSPF

B．RIP

C．RARP

D．BGP

HF系统的工作频率范围（）.

A.2.0—30MHz

B.2.0—23.999MHz

C.2.8—23.999MHz

D.23.999—30MHz