【单选题】如果装载后飞机的重量为W,重心位于重心前限之前,到重心前限的距离为D,要将飞机重心调到实用重心范围之内,需要临时压舱物的最小重量是多少?()
A.
应该在重心前限之后放置临时压舱物,如果临时压舱物距离重心前限为S,压舱物的最小重量为W×S/D。
B.
应该在重心前限之后放置临时压舱物,如果临时压舱物距离重心前限为S,压舱物的最小重量为W×D/S。
C.
应该在重心前限之前放置临时压舱物,如果临时压舱物距离重心前限为S,压舱物的最小重量为W×S/D。
D.
应该在重心前限之前放置临时压舱物,如果临时压舱物距离重心前限为S,压舱物的最小重量为W×D/S。
【多选题】当万向节十字轴轴颈表面有( )时, 应更换。
【简答题】St. Paul’s Cathedral Ludgate Hill, EC4 Underground: St. Paul’s; Bus: 6, 8, 11, 15, 22, 25 Open: Daily 8:00-19:00 (17:00 from Oct. to Mar.) Entrance free Designed by the great architect, Sir Christophe...
【单选题】Visitors to St. Paul's Cathedral are sometimes astonished as they walk round the space under the arch to come upon a statue which would appear to be that of a retired armed man meditating upon a waste...
A.
they don't expect it to be there
B.
it's dressed in Roman costume
C.
it's situated in the dome
D.
it's dressed in eighteenth-century costume
【单选题】The Ruins of St. Paul‘s is a famous scene in .
【单选题】St. Paul's Cathedual is in ____.