The government have realized the use the returnees make ______ the experience and skills ________while living abroad.

A．of; gained

B．of; gain

C．for; gained

D．up; gain

正常成年人第二颈椎以下的椎管前后径的范围为（）

A.3～5mm

B.6～10mm

C.10～21mm

D.25～30mm

E.32～35mm