今天做了一道题,是这样写的21.Globalwarmingcausessea-levelrisesby...a:increaseoceantemperature,resultinginexpansionofoceanvolumeb:meltingfloatingsea-iceatArcticOcean,resultinginincreaseinthetotalamountofwaterinoce

　　今天做了一道题,是这样写的

　　21.Globalwarmingcausessea-levelrisesby...

　　a:increaseoceantemperature,resultinginexpansionofoceanvolume

　　b:meltingfloatingsea-iceatArcticOcean,resultinginincreaseinthetotalamountofwaterinocean

　　c:meltingofglacierathighmountainandatAntarcticandGreenland,resultinginincreaseinthetotalamountofwaterinocean.

　　答案是选a和c,但我总觉得b也没有错啊,可能是不是怀疑会不会增加水的总量,但我又觉得没有问题.既然c对了,b也对啊...疑惑中...