地层原始温度与土壤表面年()温度基本相等
道路运输结构调整的重点内容包括()。 ["A.企业组织结构调整","B.运力结构调整","C.经营结构调整","D.从业人员结构调整","E.运输组织结构调整"]
若在d曲线上某一点的Ed=3,P=6,则相应的MR为() ["A.MR=2","B.MR=4","C.MR=18","D.MR=1"]
垄断竞争厂商长期均衡的条件是() ["A.MR=MC","B.MR=LMC=SMC=LAC=SAC","C.MR=LMC=SMC,AR=LAC=SAC","D.MR=LMC=AMC"]
道路运输市场机制具有()的特点。 ["A.关联性","B.制约性","C.客观性","D.动态性"]
日温度波动影响只有()m。