按要求完成句子.(10%)

1. Frank is running. (改为一般疑问句)

    ____ frank ____?

2. Her father is watching TV. (用at night 改写)

    Her father _____ _____ at night.

3. Betty usually does her homework after school. (变为否定句)

    Betty usually _____ _____ _____ homework after school.

4.What does your aunt do? (改为同义句)

    ____ ____ your aunt?

5. Susan is talking with her friends. (就画线部分提问)

    ____ ____ Susan ____?

下列关于食物中毒的特征描述正确的是( )。

A．潜伏期短起病急

B．临床表现相似，多为胃肠道症状

C．发病者均与某种食物有明确的联系

D．易集体发病

E．无明显的季节性