模拟量控制、顺序控制、保护联锁控制及单独操作在共同作用同一个对象时，这四者的优先级从高到低应该为（）。

A.单独操作、联锁控制、模拟量控制和顺序控制；

B.联锁控制、单独操作、模拟量控制和顺序控制；

C.模拟量控制和顺序控制、单独操作、联锁控制。

句型转换。

1. My father stayed there for two months. (对划线部分提问)

    ________ ________ did your father ______ there?

2. He went to school at the age of seven. (改为同义句)

    He went to school ________ he ________ seven years ________.

3. This bike is new. (改为复数句子)

     ________ bikes ________ new.

4. We played basketball yesterday afternoon. (对划线部分提问)

    ________ ________ you ________ yesterday afternoon?

5. He is too short. He can't reach the banana. (改为一句话)

    He is ________ short ________ ________ the banana.