In battery charging rooms，ventilation should be provided（）. at the lowest point。 near the batteries。 at the highest point。 only when charging is in progre。
If passengers are on board when an abandon ship drill is carried out，they should（）. take part。 watch。 go to their quarters。 stay out of the way and do what they want。
地基施工结束，宜在一个间歇期后，进行质量验收，间歇期由什么确定？
I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair. obliged。 obliging。 oblige。 being obliged。
装载机仪表盘上的发动机水温表指示发动机冷却水温度；正常工作时，适宜温度为（）℃。 40～60。 60～80。 80～90。 100～110。
装载机最重要的安全装置是（）。
