单项选择题

硬性前环曲面接触镜光学区直径约为( )
A．4.00mm B．5.00mm C．7.00mm D．8.00mm

A.4.00mm
B.5.00mm
C.7.00mm

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卷舌动作是纠正( )
A．b、p、f B．z、c、s C．zh、ch、sh
D．d、t、n E．g、k

A.b、p、f
B.z、c、s
C.zh、ch、sh

D.d、t、n