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【简答题】
PLC的工作模式有 停止 和 运行 模式,这两种工作模式均属于扫描工作方式。
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皮皮学刷刷变学霸
举一反三
【判断题】营销策划方案是营销策划的书面反映形式。( )
A.
正确
B.
错误
【单选题】Special data that describe the data contained in a database are called ________.
A.
open matrices
B.
primary data
C.
metadata
D.
closed matrices
【单选题】Accessing data from a floppy disk is called( )data.
A.
printing
B.
reading
C.
writing
D.
listening
【单选题】The so-called data encapsulation is to assemble a group of data and related operations together to form an entity, which is also known as ( ).
A.
class
B.
object
C.
the function body
D.
data block
【单选题】When building a warehouse, the process of reformatting data so that it conforms to set standards is called ________.
A.
extraction
B.
transformation
C.
loading
D.
normalization
【单选题】下列关于质量检验计划的表述有误的是( )。
A.
检验计划是产品生产者对整个检验和试验工作进行的系统策划和总体安排的结果
B.
编制质量检验计划的目的是指导检验人员完成检验工作,保证检验工作的质量
C.
质量检验计划必须由质量管理部门或质量检验的主管部门负责,由检验技术人员编制
D.
编制检验计划要充分体现检验的目的并要综合考虑检验成本
【简答题】使用水基清洗剂时一般应[2分]
【单选题】The formatting process also looks for defective areas of the disk, called ___,?and cordons them off so data cannot be stored there.
A.
bad sectors
B.
bad tracks
C.
warped data
D.
warped links
【单选题】压缩机传动皮带张进度检查时,皮带挠度约是( ) mm
A.
5–8
B.
10–15
C.
20–40
D.
20–30
【单选题】In the data link layer, the data unit is called(71).
A.
flame
B.
Packet
C.
Signal
D.
APDU
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