单项选择题
Living by hunting and reindeer herding, the Evenki are ...
判断题Living by hunting and reindeer herding, the Evenki are the last hunting people living in China now.
APU低压valve有几个马达()A.一个直流马达B.两个直流马达C.一个直流马达和一个交流马达
单项选择题APU低压valve有几个马达()
高温测量应采用( )测温。(接触式/非接触式)
未知题型高温测量应采用( )测温。(接触式/非接触式)