下列不属于售前服务的是（）。
A.提供咨询
B.协助选购
C.提供零件
D.提供资料
参考答案：C
一只苍蝇的腹内细菌多达2800 0000个，用科学记数法表示是( )
— What do you think of their performances?
— Very wonderful.I was deeply________with the last one. [ ]
A. moved
B. impressed
C. developed
D. enjoyed
