示教器使能端的作用有哪些
A. 保证人身安全
B. 手动模式下操作机器人
C. 磨合电机性能
D. 一种方便操作的设计
在不使用示教器的时候，随便放置好示教器即可。
A. 对
B. 错
What is reported in the news?
A deadly fish has been spotted in the Mediterranean waters.
B. Invasive species are driving away certain native species.
C. The Mediterranean is a natural habitat of Devil Firefish.
D. Many people have been attacked by Devil Firefish.
What is the environmentalist concern about the spread of devil fire fish in the Mediterranean?
A. It could add to greenhouse emissions.
B. It could disrupt the food chains there.
C. It could pose a threat to other marine species.
D. It could badly pollute the surrounding waters.
微信支付 
支付宝支付