题目

－How many words are there in this story? －There are __________. A. two hundred and forty five B. two hundreds and forty five C. two hundred and forty-five D. two hundreds and forty-five 答案：C53、下列变化是化学变化的是（　　）A、石油蒸馏B、煤干馏C、干冰升华D、天然气泄露