【单选题】对于火焰原子吸收光谱仪的维护,( )是不允许的。
C.
元素灯长期不用,则每隔一段时间在额定电流下空烧
【单选题】The tree has grown against a warm wall on a sheltered side of the house. ( )
B.
on a sheltered side of the house
C.
against a warm wall on a sheltered side of the house
【单选题】His sheltered childhood life had left him unprepared for the ____ realities of adult life.
【单选题】对于火焰原子吸收光谱仪的维护,()是不允许的。
【单选题】对于火焰原子吸收光谱仪的维护,()是不允许的。
C.
元素灯长期不用,则每隔一段时间在额定电流下空烧
【判断题】致知在儒家那里就是提升德性,涵养性灵,完善自我的过程。()
【单选题】He based most of his key ideas on observations of his own children - Jacqueline, Laurent and Lucienne - whose upbringing was very sheltered .