战勤保障大队绝缘靴储备数量为30双。
If a fixed foam firefighting system on a ship is not of the premix type，a sample of the foam liquid must be tested by（）. ["a Coast Guard inspection officer","the safety man aboard the unit","the designated person in charge of the unit","the manufacturer or his authorized representative"]
低温多晶硅TFT技术的最大优势是什么？
Which of the following operations need to be entered on the Oil Record Book Part I? （） (1) Ballast of fuel oil tanks (2) Condition of oil discharge monitoring and control system ["（1）only","（2）only","both（1）and（2）","neither（1）nor（2）"]
什么是市政工程施工干扰费？
OLED是什么？
