【多选题】根据《跟单信用证统一惯例》(UCP600),在可转让信用证业务中,下列哪些认识是正确的?( )
【单选题】夹紧力的方向应尽量垂直于工件的主要定位( )。
【判断题】产品生命周期是指产品的自然寿命或使用寿命
【单选题】护士为颅内高压的患者输注20%甘露醇250ml,静脉滴注的时间要求是
【判断题】The author Qu Yuan is a great poet and the first writer to have his name associated with his work in the history of Chinese literature.
【判断题】Decide True or False: The author Qu Yuan is a great poet and the first writer to have his name associated with his work in the history of Chinese literature.
【判断题】夹紧力的方向应垂直于工件的主要定位基面 (限制自由度最多或定位精度要求高的定位面),以保证加工精度。
【单选题】护士为颅内高压的患者输注20%甘露醇250ml,静脉滴注的时间要求是
【判断题】夹紧力的方向应有利于减少夹紧作用力,所以夹紧力最好和重力、切削力同向,且垂直于工件的定位基准面。