碳弧气刨刨削电流增加时，刨宽和刨深都增加，其中尤以槽宽增加更为显著。( )
参考答案：错
—Did you arrive here this morning?
—Yes,it was at nine o’clock ____we came here.
A．when
B．before
C．which
D．that
新生儿棒式体温汁示值允差是
A．±0.1℃
B．±0.15℃
C．±0.2℃
D．±0.5℃
E．±1.0℃
