材料采购保管费包括（）。
A.本采购费
B.场外运输费
C.工地保管费
D.仓储损耗
E.仓储费
参考答案：A, C, D, E
沿x轴负方向传播的简谐波在t=0时刻的波形如图所示，已知波v=5m/s，试画出平衡位置在x=10 cm的质点A的振动图象。
They're ________ bike riding and _________ hiking for vacation. [ ]
A. go; go
B. going; go
C. going; going
D. go; going
