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【单选题】

我们的药品,90%以上都是国外专利;我们的数控机床70%都是国外专利;我们的汽车90%都是合资企业或者是国外品牌。这给我们的哲学启示是( )

A.
矛盾双方在一定条件下相互转化
B.
外因是事物变化发展的必要条件
C.
要有创新精神,学会创造性思维
D.
要用联系的观点看问题
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刷刷题刷刷变学霸
举一反三

【单选题】"We thought there was a future in nuclear power when no one else believed in it," says Anne Lauvergeon, chief executive of Areva. The French, government-owned company is building the first nuclear rea...

A.
Areva’s capacity is much bigger than Westinghouse and GE Hitachi
B.
readers figures to attract their attention
C.
readers the existing truth in nuclear market
D.
nuclear power has been in the state of revival

【单选题】数控机床的核心是( )。

A.
伺服系统
B.
数控系统
C.
系统反馈
D.
传动系统

【多选题】数控机床主机包括( )

A.
主轴
B.
导轨
C.
床身
D.
交换工作台
E.
排屑装置

【单选题】"We thought there was a future in nuclear power when no one else believed in it," says Anne Lauvergeon, chief executive of Areva. The French, government-owned company is building the first nuclear rea...

A.
With hardly any other resource, they chose nuclear as a way.
B.
They have always been sticking to building new reactors.
C.
They construct nuclear reactors only for their own use.
D.
Nicolas Sarkozy toured to promote nuclear expertise to win election.

【单选题】我国高速加工机床的进给系统一般是( )

A.
精密步进电机+精密丝杆
B.
高性能伺服电机+精密丝杆
C.
交流伺服电机+滚珠丝杠螺母副
D.
直线驱动电机