GB50094-1998《球形储罐施工及验收规范》规定，请指出下列气密性试验应符合哪些条件（）。
用深冷法制氧的设备在安全上有何特点？
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）. ["on loran charts covering areas where sky waves are used","in the Radio Aids to Navigation，PUB 117","in the Loran-C Correction Tables","Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading"]
世界上出口量最大的潜艇是哪国的？
The basic collision avoidance display presented by CASII is designed for easy interpretation and（）of possible collision threat situations. ["full confirmation","precise appreciation","immediate assessment","timely recognitio"]
低温法空气分离设备常见的流程有哪几种各有什么特点？
