作业材料费包括罗卜头以下的井下工具费用和施工方案要求更换的（）。
参考答案：采油树费用
20112﹣2010×2012（用简便方法计算）．
In 1969 ____took his biggest step away from the earth. Americans first walked on the moon.This is certainly just a ____thought.
A．he,moving
B．people ,surprising
C．an astronaut, interesting
D．man ,beginning
