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【简答题】
工业机器人的末端执行器有机械式、吸附式和专用工具三类，试分析一下真空吸附末端执行器是如何依靠吸附力抓取物料的。
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皮皮学刷刷变学霸
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【简答题】试析国际贸易中信用证的性质和作用
【单选题】A good way to train an animal to do something quickly is to_____. A make the action easy
B.
praise it in words
C.
reward it with food
D.
weaken its motivation
【单选题】If you have difficulty_______a decision，wearing red_______it easier for you to take action．
A.
make；making
B.
made；making
C.
making；make
D.
making；makes
【单选题】Obviously the only way to make people realize that an action is morally wrong is to punish them if they ________ it.
A.
confirm
B.
create
C.
commit
D.
compensate
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