The need for an operation，especially an immediate operation， almost always comes as a ______ to the patient and his family.

A．result

B．happiness

C．disappointment

D．shock

关于我国海军建设，以下说法不正确的是（）。

A.是一支装备复杂，技术密集的军种

B.是由多兵种合成的军种

C.是初具现代化作战能力的武装力量

D.是一支较强的近海防御、远洋攻击的力量