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【简答题】
机电一体化系统一般由()、()、()、控制及信息处理、动力系统等五部分组成,各部分之间通过接口相联系。
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举一反三
【单选题】What is the main idea of this passage?
A.
The Ice Age was a long period of time.
B.
Great glaciers covered North America many years ago.
C.
Changes in climate helped to melt the glaciers.
D.
How glaciers changed North America.
【简答题】《证券账户管理规则》规定，一个自然人、法人只能开立一个证券账户。（ ）
【单选题】Why the period of time selected is limited?
A.
The future is uncertain.
B.
The ability to forecast.
C.
The degree of accuracy.
D.
The time is not enough to finish the project.
【简答题】《证券账户管理规则》规定，一个自然人、法人只能开立一个证券账户。
【简答题】《证券账户管理规则》规定，一个自然人、法人只能开立一个证券账户。 （ ） A．正确 B．错误
【单选题】The trouble-free life of an engine indicates _____.
A.
the period of time during which no trouble occurs to the engine
B.
no trouble will occur to the engine all its life
C.
trouble may occur freely to the engine
D.
no matter what you do to the engine, no trouble will occur during this period
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