According to the report, what did IEA keep doing in the past half a year a. It kept revising the forecast of world oil demand upwards. b. It kept making serious mistakes in forecasting. c. It kept lowering down the world energy consumption. d. It kept increasing the oil prices.

房地产契税的征税对象为转移土地、房屋权属的行为，主要包括（）

A.房屋买卖

B.房屋交换

C.土地使用权转让

D.国有土地使用权出让

E.农村集体土地承包经营权的转让