常用的浸树脂石墨有浸酚醛树脂石墨、浸环氧树脂石墨、浸呋喃树脂石墨等。
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在进行()运算时,如果有带分数,一般要先把它化成假分数后再进行演算。
A. 分数加法
B. 分数减法
C. 分数乘法或除法
All engineer officers and engine room ratings shall be aware of the serious effects of operational or accidental pollution of the marine environment and shall take all possible() to prevent such pollution, particularly within the framework of relevant international and port regulations.
A. steps
B. procedures
C. precautions
D. program
旅行社质量保证金的管理实行“统一交纳、统一标准、统一管理”的原则。
A. 正确
B. 错误