下列环境中，菌类生物较多存在[ ]
A．刚煮熟的食物中
B．火山口的熔岩中
C．腌制食品的盐水中
D．流通的货币上
答案：D
Flooding of any compartment in a ship that results in a serious loss of reserve buoyancy will always（）.
A.increase the trim
B.increase ship stability
C.cause a serious list
D.decrease the heeling moment
