单项选择题

A1型题 当血钙浓度低于何值时可引起手足搐搦()

A.1.5~1.63mmol/L(6~6.5mg/dl)
B.1.63~1.75mmol/L(6.5~7mg/dl)
C.1.75~1.88mmol/L(7~7.5mg/dl)
D.1.88~2.0mmol/L(7.5~8mg/dl)
E.2.0~2.13mmol/L(8~8.5mg/dl)