自动喷水灭火系统的供水设施安装时,环境温度不应低于10℃,否则应采取防冻措施。()
参考答案:错
一块冰的体积为30L,如果全部熔化成水,则体积变化了多少?(冰的密度为0.9×103kg/m3)
“Representative samples were drawn at random from the aboved mentioned goods and were inspected with the results as follows”,最确切的翻译是( )。
A.从上述货物中抽取代表性样品,经检验结果如下B.从上述货物中任意抽取样品,经检验结果如下C.从上述货物中抽取样品,经检验结果D.从上述货物中任意抽取代表性样品,经检验结果如下