皮皮学，免费搜题
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搜题
【多选题】
从电子合同当事人之间的关系的角度，电子采购合同可以分为（）A.
B-C合同
B.
B-B合同
C.
B-G合同
D.
C-C合同
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which of the following most accurately describes how to calculate the unemployment rate?
A.
(Unemployed / population) × 100
B.
(Unemployed / employed) × 100
C.
(Unemployed / labor force) × 100
D.
[(Unemployed – employed) / labor force] × 100
【单选题】20150275(75)describes how to interact with the information system to accomplish specific tasks.
A.
System specification
B.
Program specification
C.
User guide
D.
System document
【单选题】(75) describes how to interact with the information system to accomplish specific tasks.
A.
System specification
B.
Program specification
C.
User guide
D.
System document
【单选题】( )describes how to interact with the informationg system to Accomplish specific task.
A.
System specification
B.
Program specificationg
C.
User guide
D.
System document
【单选题】( )describes how to interact with the information system to accomplish specific tasks.
A.
System specification
B.
Program
C.
User guide
D.
System document
【单选题】导入的原理图元件放在PCB文件的 ( )工作层面进行元件布局。
A.
Top Layer
B.
Bottom Layer
C.
Mechanical 1ayer
D.
Keep—Out Layer
【单选题】导入的原理图文件放在 PCB 文件的 ( ) 工作层面进行元件布局。
A.
Top Layer
B.
Bottom Layer
C.
Mechanical 1
D.
Keep—Out Layer
【单选题】describes how to interact with the information system to accomplish specific tasks.
A.
System specification
B.
Program specification
C.
User guide
D.
System document
【单选题】导入的原理图文件后,元器件放在PCB文件的 ( )工作层面进行元件布局。
A.
Top Layer
B.
Bottom Layer
C.
Mechanical 1
D.
.Keep—Out Layer
【简答题】如果类B是从类A继承而来的,则类A叫做类B的______,类B叫做类A的______。
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