Controls for a fixed carbon dioxide system shall be mounted().
A. directly outside the space protected by the system
B. as near the gas cylinders as possible
C. in the pilothouse
D. on the main deck near the bow
水罐消防车的侧出水管路由左右出水管,正回阀、出水球阀和闷盖等主要部件组成。
A. 正确
B. 错误
韭菜采收时呼吸强度极高,高温下叶片很快发黄腐烂,因此采后要及时预冷,保证贮藏品质。
A. 正确
B. 错误
我国优抚安置保障的责任主体是()和(),优抚安置的对象是()及其()这一特殊群体。