女性,10岁,诊断为重症心肌炎,心脏听诊可能出现的特征性体征是()
A. 开瓣音
B. S2固定分裂
C. 钟摆律
D. S1增强
E. P2增强
查看答案
在“与”逻辑门电路中,输入量A为1,输入量B为1,则输出函数Z为()。
工业固体废弃物的分类是()
A. 危险固体废弃物
B. 可回收固体废弃物
C. 不可回收固体废弃物
In a lab, R1 connects to R2, which connects to R3. R1 and R2 each have several working interfaces, all assigned addresses in class A network 10.0.0.0. Router R3 has some working interfaces in class A net work 10.0.0.0, and others in class B network 172.16.0.0. The engineer experiments with the auto -summary command on R2 and R3, enabling and disabling the command in various combinations. Which of the following combinations will result in R1 seeing a rout e for 172.16.0.0/16, instead of the individual subnets of class B network 172.16.0.0?()
A. auto - summary on R2 and no auto - summary on R3
B. auto - summary on R2 and auto - summary on R3
C. no auto -summary on R2 and no auto- summary on R3
D. no auto - summary on R2 and auto - summary on R3
公安机关上下级之间的关系是()。
A. 领导与被领导的关系
B. 监督与被监督的关系
C. 指导与被指导的关系
D. 相互独立的关系