测定渐变焦眼镜的单侧瞳距，应使双侧配镜十字的水平线对准测量卡的（）线。
A、近用参考线
B、垂直0位线
C、水平0位线
D、棱镜线
参考答案：C
He﹍﹍the job well, but he so careless.
A．had done; had been
B．could do; was
C．could have done; was
D．hadn’t done; had been
持续性枕后位的特点是
A．发生原因之一是胎头仰伸
B．产妇过早感觉肛门坠胀而使用腹压
C．不易发生宫颈水肿
D．肛查觉盆腔前部空虚
E． * * 检查矢状缝在骨盆斜径上，前囟在骨盆后方
