What do signal words of time include?

What do time perceptions include ? A: Punctuality B: Willingness to wait C: Interactions D: The use of time

Which of the following is false?（） A: preparation for stand-by should be organized by engine room B: engine trails should be agreed with bridge, and then do it C: As to engine trials of the twin diesels and two propellers, the two diesels should use “slow ahead” at the same time D: After engine trials, the handle of the engine telegraph should be put in the “stop” positio

What should we do to _____________ environment in daily life? A: smoke B: stop C: protect D: smog

John Dewey believed that education should be a preparation for life， that a person learns by doing， and that teaching must ________ the curiosity and creativity of children.