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【多选题】
下列选项中,属于线性规划解的情况的有A.
存在唯一最优解
B.
存在无穷多最优解
C.
无有限最优解
D.
无可行解
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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】关于新型立轴式钻机的特点下列说法不正确的是
A.
采用大立轴、圆立轴。
B.
增大了给进系统的给进行程，采用不停车（转）倒杆装置。
C.
液压系统采用变量泵或双联泵，或增加手动液压泵；给进油缸操纵阀具有“H”型或“Y”型油道可进行无泵减压钻进、差动连接快速倒杆。
D.
多为纯机械传动式钻机。
【多选题】which statemetes are true about the V sign when holding two fingers upright with palm and fingers faced outward ?()
A.
It is a signal for victory in China
B.
It means “piss off or go away” in UK.
C.
In America it means peace.
D.
It is insulting.
【简答题】WARNING: Holding a cell phone against your ear or putting it in your pocket may be bad for your health. This sentence is a warning that you’d better not put it close to you when a new phone is bought....
【简答题】Holding a cell phone against your ear or stalling it in your pocket may be hazardous to your health． This paraphrases a warning that cell phone; manufacturers include in the small print that is often ...
【简答题】Holding a cell phone against your ear or storing it in your pocket may be erous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignor...
【单选题】Holding your palm towards yourself with the index and middle finger raised in a V-sign means in England.
A.
Victory
B.
Peace
C.
An insult
D.
Stop
【单选题】Which of the following is a right skill of goalkeeping?
A.
Using your palm to hold the ball.
B.
Putting the ball under your feet.
C.
Letting the ball rest on your forearms.
D.
Kicking the ball out as soon as you catch it.
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