The rate of heat transfer from a hot region to a cold region is affected most by the _____.
A.size of the heat sink
B.temperature difference between the regions
C.size of the heat source
D.total heat of the system

楔形曲线一定是上倾的三角形。 （ ） 点击查看答案&解析

公司制交易所的资金来源于股东，只要交易所有盈利，就可将其作为红利在出资人中进行分配。 （ ） 点击查看答案&解析