Due to lapse of time the risk in these areas to surface navigation is now considered ()than the ordinary risks of navigation,but a very real risk still exists with regard to anchoring,fishing or any form of submarine or seabed activity. more serious。 not less serious。 more dangerous。 no more dangerou。
The design of () is similar to that of the main bearing. the block bearing。 the camshaft bearing。 the connecting rod small end bearing。 the connecting rod large end bearing。
客户在08年4月3日成功申请定期定额服务,则首次扣款日从()起开始。 4月3日。 4月8日。 5月3日。 5月8日。
The cylinders, with cooling jackets, are () to the engine frame by eight tie rods. screwed。 welded。 fastened。 rotated。
两速调速器的作用是限制发动机()和稳定发动机怠速。 最高转速。 高速。 中速。 低速。
以下关于电源的说法不正确的是()。