急性肝炎患者血清酶升高的是（）

A.ALT

B.AST

C.LDH

D.CPS-Ⅰ

E.CPS-Ⅱ

Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.

A.the Canadian Coast Guard

B.Ice Sarnia

C.the Ice Navigation Center

D.the icebreaker assigned to the area