Which three statements are true regarding the logical structure of the Oracle database?()
AEach segment contains one or more extents.
BMultiple tablespaces can share single data file.
CA data block is the smallest unit of I/O for data files.
DIt is possible to have tablespaces of different block sizes in a database.
EEach data block in the database always corresponds to one OS block.
221.17.101.223/28 is an example of which kind of notation?()
A、ARP
B、CIDR
C、DNS
D、Port Number
Which of the following is the MOST common pin-out configuration used when crimping RJ-45 connectors?()
A、UTP
B、T568A/B
C、STP
D、IEEE 802.5
第3号邮局协议的英文所写为()
A、SNMPV3
B、POP
C、SMTP
D、POP3
下面哪个属性肯定不是框架控件的属性( )。
A、Text
B、Caption
C、Left
D、Enabled
女,31岁,便秘多年,反复发作尿路感染,多次尿培养为大肠杆菌生长,夜尿增多。尿检蛋白(±),白细胞5~15个/HP,红细胞3~5个/HP,临床诊断慢性肾盂肾炎,已实施正规治疗。下列护理指导中哪项对预防复发无意义()
A、继续抗菌治疗
B、禁用肾毒性抗生素
C、保持大便通畅
D、多饮水
E、注意经期卫生