下列哪项血脂异常不是冠状动脉粥样硬化的危险因素（）。

A.总胆固醇（TC.升高

B.甘油三酯（TG）升高

C.低密度脂蛋白（LDL）升高

D.极低密度脂蛋白（VLDL）升高

E.高密度脂蛋白（HDL）升高

If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm，you should（）.

A.start the fire pump

B.go to your man overboard station

C.go to your lifeboat station

D.stand by for collision