()汽车尾部过分向后伸出,形成阶梯状,在高速时会产生较强的空气涡流。 ["箱型","流线型","船型","楔形"]
汽轮机节系统的任务是什么?
发出查询或查复时须经()审批。 ["运营主管","运营主管指定专人","营业机构负责人","行长"]
乙炔与氧气混合的爆炸浓度范围为() ["2.2%~81%","2.8%~93%","3.3%~18%","12.5%~80%"]
CorelDRAW X5【标题栏】中显示下列哪些信息?() ["文件路径","文件名称","文件存储大小","文件版本"]
獭兔也有啮齿行为吗?