如图是小明同学设计的一种蒸汽船的原理图，从图中可以看出，促使该船前进的力是___________________，你所知道的与该原理相同的实际应用有__________________（说出一种即可）。

When planning activities for an elderly nursing home resident with a diagnosis of vascular dementia, the nurse should()

A．Plan varied activities that will keep the resident occupied

B．Provide familiar activities that the resident can successfully complete

C．Offer challenging activities to maintain the resident’s contact wit reality

D．Make sure that the resident actively participates in the unit’s daily activities