In many installations basket strainers consist of a cylindrical container in which a perforated metal or wire basket is suspendedThe bold and italic word “which” means （）. ["installations","basket strainers","a cylindrical container","a metal or wire basket"]
（）情况的电动机可不装设过负荷保护。 ["用熔断器作保护的电动机","短时间内反复开机、停机的电动机","4.5千瓦及以下连续运行的电动机","过负荷可能性很小的电动机","经常有人监视的电动机"]
如果处于无人监控的情况下，可以使用哪项放映方式（）。 ["演讲者放映","观众自行放映","在展台浏览（全屏幕）","观众手动放映"]
下列符合"重义轻利"的描述是（）。 [""君子爱财，取之以道"",""富与贵，是人之所欲也，不以其道得之，不处也"",""君子寓于义，小人喻于利"",""兼相爱，交相利"",""礼以行义，义以生利""]
The effect known as bank cushion acts in which of the following ways on a single-screw vessel proceeding along a narrow channel? （） ["It forces the bow away from the bank","It forces the stern away from the bank","It forces the entire vessel away from the bank","It heels the vessel toward the bank"]
采用单一来源方式采购的条件是什么？
