小调
参考答案：
是主要在街巷之中演唱的曲调与词句较为固定的民间小曲。
All the injured in the disaster are believed ____ in time. [ ]
A. treating
B. to treat
C. to be treated
D. to be treating
大数法则的机率原则告诉我们：要想达成销售业绩，其前提保证是发展足够的客户数量。
