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【单选题】
对于线性规划问题,下列说法不正确的是( )。
A.
线性规划问题如有最优解，则最优解可在可行域顶点达到。
B.
线性规划问题可能没有可行解
C.
在图解法中，线性规划问题的可行域都是凸区域
D.
线性规划问题一般都有最优解
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举一反三
【单选题】Try to get to know the function of each part. The mirror is ___
A.
the reflective device for the digital single lens camera. It is used to correct the reverse pictures on the focusing screen, so that operator can frame and focus correctly.
B.
used to reflect pictures captured by lens to upper pentaprism. (When the photographer presses the shutter, the mirror will bounce and the shutter curtain will bounce too, so that the inside sensor can sense the light and record the picture.)
C.
equivalent to an ideal film plane. Distance from the mirror to the focusing screen is equal to the distance from the mirror to the film plane.
查看完整题目与答案
【简答题】PART 3 Discussion topic: Media Example questions — How do most people in your country get the news? — Compare newspapers and TV as news sources. — Do you think that the different media (newspapers, TV...
查看完整题目与答案
【判断题】能使从动件得到周期性的时停、时动的机构，都是间歇运动机构。
A.
正确
B.
错误
查看完整题目与答案
【单选题】YL-335B控制系统采用PPI( )进行通信。
A.
串行总线
B.
并行总线
C.
分布式总线
D.
串并联式总线
查看完整题目与答案
【单选题】行为人超越代理权订立的合同相对人可以催告被代理人在( )
A.
3个月内追认
B.
2个月内追认
C.
1个月内追认
D.
15天内追认
查看完整题目与答案
【单选题】行为人超越代理权以被代理人名义订立的合同，相对人可以催告被代理人予以追认。被代理人未作表示的视为(    )。
A.
合同无效    
B.
合同有效
C.
合同效力未定    
D.
该合同由被代理人承担责任
查看完整题目与答案
【单选题】Try to get to know the function of each part. The shutter is ___
A.
an opaque piece of metal or plastic inside your camera that prevents light from reaching the film or digital sensor. The shutter is opened, or released, by the shutter release button.
B.
the reflective device for the digital single lens camera. It is used to correct the reverse pictures on the focusing screen, so that operator can frame and focus correctly.
C.
equivalent to an ideal film plane. Distance from the mirror to the focusing screen is equal to the distance from the mirror to the film plane.
查看完整题目与答案
【判断题】负载作星形联接时，必有线电流等于相电流。 （ ）
A.
正确
B.
错误
查看完整题目与答案
【单选题】行为人超越代理权以被代理人名义订立的合同，相对人可以催告被代理人予以追认。被代理人未作表示的视为：
A.
合同无效。
B.
合同有效。
C.
效力待定。
D.
合同由被代理人承担责任。
查看完整题目与答案
【判断题】负载作星形联接时，必有线电流等于相电流
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】Try to get to know the function of each part. The mirror is ___
A.
the reflective device for the digital single lens camera. It is used to correct the reverse pictures on the focusing screen, so that operator can frame and focus correctly.
B.
used to reflect pictures captured by lens to upper pentaprism. (When the photographer presses the shutter, the mirror will bounce and the shutter curtain will bounce too, so that the inside sensor can sense the light and record the picture.)
C.
equivalent to an ideal film plane. Distance from the mirror to the focusing screen is equal to the distance from the mirror to the film plane.
查看完整题目与答案
【简答题】PART 3 Discussion topic: Media Example questions — How do most people in your country get the news? — Compare newspapers and TV as news sources. — Do you think that the different media (newspapers, TV...
查看完整题目与答案
【判断题】能使从动件得到周期性的时停、时动的机构，都是间歇运动机构。
A.
正确
B.
错误
查看完整题目与答案
【单选题】YL-335B控制系统采用PPI( )进行通信。
A.
串行总线
B.
并行总线
C.
分布式总线
D.
串并联式总线
查看完整题目与答案
【单选题】行为人超越代理权订立的合同相对人可以催告被代理人在( )
A.
3个月内追认
B.
2个月内追认
C.
1个月内追认
D.
15天内追认
查看完整题目与答案
【单选题】行为人超越代理权以被代理人名义订立的合同，相对人可以催告被代理人予以追认。被代理人未作表示的视为(    )。
A.
合同无效    
B.
合同有效
C.
合同效力未定    
D.
该合同由被代理人承担责任
查看完整题目与答案
【单选题】Try to get to know the function of each part. The shutter is ___
A.
an opaque piece of metal or plastic inside your camera that prevents light from reaching the film or digital sensor. The shutter is opened, or released, by the shutter release button.
B.
the reflective device for the digital single lens camera. It is used to correct the reverse pictures on the focusing screen, so that operator can frame and focus correctly.
C.
equivalent to an ideal film plane. Distance from the mirror to the focusing screen is equal to the distance from the mirror to the film plane.
查看完整题目与答案
【判断题】负载作星形联接时，必有线电流等于相电流。 （ ）
A.
正确
B.
错误
查看完整题目与答案
【单选题】行为人超越代理权以被代理人名义订立的合同，相对人可以催告被代理人予以追认。被代理人未作表示的视为：
A.
合同无效。
B.
合同有效。
C.
效力待定。
D.
合同由被代理人承担责任。
查看完整题目与答案
【判断题】负载作星形联接时，必有线电流等于相电流
A.
正确
B.
错误
查看完整题目与答案