On the south and the east coasts of Block Island are circles with a dot in the center and labeled CUP. This is a (). conspicuous object。 steep depression in the surrounding hills that resembles a cup。 domed structure useful for navigation。 calling-up-point used for traffic control。
船舶遇险时搜救雷达应答器(SART)在操作上应能容易由非熟练人员操作。
变压器本体气体保护继电器接口应选用()口径连接。 80mm。 50mm。 40mm。 30mm。
冷却装置压力试验压力和时间分间分别为() 0.1Mpa、24h。 0.2Mpa、12h。 0.1Mpa、20h。 0.2Mpa、24h。
Navigational charts are () frequent changes,the important one of which are promulgated by Admiralty Notices to Mariners. published with。 combined with。 in connection with。 subject to。
第三方存管客户帐户管理业务主要包括哪些()。