投资基金与债券、股票一样，都属于直接投资工具。( )
参考答案：错
解析： 投资基金是一种间接投资工具。
声音是由物体的_______ 而产生的，声音的传播需要______，平时我们听到的声音，一般是靠_________来传播的。
When I went to watch the 16th Asian Games last month, I was greatly touched by the fact that
____ people from all walks of life are working hard for ____ new Guangzhou. [ ]
A. the; a
B. ／; a
C. the; the
D. ／; the
B. ／; a