( )是指建设项目开工建设前进行项目规划,可行性研究报告、初步设计等前期工作所发生的费用。
A.项目建设管理费B.预付款C.质量保证金D.前期工作费
参考答案:D
—Do you often see William _____ on the playground?
—No, but he is often seen to play Chinese kung fu in the park.[ ]
A. run
B. to run
C. ran
D. to running
用传送带将货物运往高处,货物随传送带做匀速直线运动.若以传送带作参照物,则货物是______的.