当采用非管道全长上标识方法时,其标识的场所应该包括所有管道的()等的管道上和其他需要标识的部位。 ["转弯处","阀门","焊接接头处","穿墙孔两侧"]
房地产投资按其投资的领域不同可分为() ["土地开发投资","房屋开发投资","商业房地产投资","工业房地产投资","住宅"]
废塑料对环境有哪些影响?
患者,男性,29岁。右胸部外伤后,胸前壁出现反常呼吸运动,应首先考虑() ["损伤性血胸","损伤性气胸","损伤性血气胸","单根单处肋骨骨折","多根多处肋骨骨折"]
枯水期下闸挡水,洪水期开闸泄水,这个水闸可能是() ["节制闸","分洪闸","进水闸","挡潮闸"]
电容器遇哪些情况应停用?