To improve efficiency, the factory______most of its workers with robots.A．operatedB．replac

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency？

What is mentioned as a factor to improve learning proficiency？A．Young age.B．Good memory.C．

According to the passage, which of the following factors does NOT help improve digestion？A

Which of the following factors leads to U. S. oil production milestone？A．Improvement on au

In the first paragraph,"Lean In" meansA．to improve efficiency.B．to bend the body forward.C

Sam set out to improve _____ at the shirt factory, but he failed at last.A.efficiency