What year was the first robot invented? Who invented the first robotic arm? Who invented the first programmable computer? Who invented the first mechanical computer? Who invented the first driverless car? Where was the first smartphone invented?
At first, the new lightweight drill has been invented to A.be used in space missions. B.pull out the heart pacemaker leads. C.replace the conventional rotary drill. D.drill the bones during procedures of medical treatment. 点击查看答案 第3题 If the sun has enough power to warm and lig...