一个人的行为对旁观者福利的影响,称为()
A.外部性
B.内部性
C.排他性
D.非排他性
参考答案:A
家在新疆的小明同学今年暑假打算去看大海 。他应该选择区以下哪个省区 ( )
A.湖南
B.青海
C.贵州
D.海南
The deadweight of a bulk carrier consists of().
A.the weight of the ship's structure and its machinery
B.bunker and other consumable loads
C.ballast loads
D.all those weights,such as the weight of the bunkers,ballast,provisions and cargo