On the annual International Volunteers Day, the world ______ the work of millions of people who give their time to help others．

A．abolishes

B．assesses

C．accompanies

D．acknowledges

关于急性心肌梗死乳酸脱氢酶的描述，不正确的是（）

A.LD和LD₁在急性心肌梗死48～72小时达峰值

B.LD测定对CK恢复的AMI有诊断价值

C.LD升高并非一定是心肌损伤所致

D.大量溶血时LD也升高

E.a-羟丁酸脱氢酶（HBDH）测定与LD同工酶无关