President Nixon was deeply_____in the Water Gate problem at that time.

A．included

B．involved

C．concerned

D．affected

显性脊柱裂均需手术治疗，手术时机选择在（）。

A.出生后立即手术

B.出生后1～3个月

C.出生后6个月

D.出生后12个月

E.成年以后