心肌梗死的"损伤型"心电图改变表现为（）。

A.病理性Q波

B.R波电压降低

C.ST段抬高

D.T波直立高耸

E.T波对称

What is required to launch a boat stowed in a crescent davit?（）

A.Hoist the boat clear of the cradle

B.Release the outboard part of the cradle

C.Rig the tricing lines

D.Crank the crescent out