What did Daniel Hayes invent？A．A single－engine fire truck.B．A water－powered fire truck.C．A

According to the passage, what is the beginning of "with us" era？A．The invention of the fi

What does the professor say about the invention of the elevator？A．It created design proble

Can you tell me ______ here today？A: what did you seeB: what you sawC: when did you see

What can we learn about the technology invented by Nur Energy？A．It will generate intenser

What did the invention of the World Wide Web lead to／A.It led to an innovative way of th

根据以下内容回答题:If you asked people what the most important invention has been manv wou