党的十五大将（）确定为党的指导思想。
A.邓 * * 理论
B.毛 * * 思想
C.三个代表
参考答案：A
如下图所示是两种声音的波形图，从图形可知：图______是音乐的波形，图______是噪声的波形．
— She looks very happy. She have passed the exam.
— I guess so. It's not difficult after all. [ ]
A. should
B. could
C. must
D. might
