镀膜镜片中，减反射膜的作用是为提高（）。
A.折射率
B.透光率
C.色散系数
D.镜片的硬度
参考答案：B
请简述遇到交接货物差错应采取的处理办法。
She had to _____ four young children after her husband died. [ ]
A. turn over
B. go over
C. watch over
D. take over
