题干

随着人们生活水平的提高,饲养宠物狗的人越来越多.宠物狗的种类繁多,通过训练能掌握一些技巧,给我们带来快乐或者提供帮助.请据此分析回答:

狗接飞碟是一项有趣的宠物狗竞技项目.在训练过程中,需伴随多次食物刺激,逐渐使宠物狗建立接碟反射.从反射类型分析,狗接飞碟属于____(填“简单”或“复杂”)反射:从行为获得途径看,狗接飞碟属于____行为.

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B

    “Mum, may Patti come over?” asked Meg.

    “Not until you clean your room,” replied Mum.

    Meg said on the phone unhappily, “I have to clean my room first.”

    At the other end, Patti laughed. She said to Meg, “That's funny. My mum just said I can't go anywhere until I clean my room.”

    After hanging up (挂断电话), the girls went to their own rooms. Each girl looked around at her mess. Slowly they started cleaning their rooms.

    Meg said to herself, “Maybe we could talk on the phone while we work. It would be hard to work and talk at the same time, though.”

    Patti thought, “Until I clean my room, I can't leave. Meg may leave, but she can't have anyone over.” Then Patti asked her mum, “Mum, may Meg come?” “Sure,” said Patti's mum. “Remember, you must have your room cleaned before leaving the house.”

    Patti ran to the phone and called Meg. “I've got an idea!” she told Meg.

    A few minutes later, Meg went over to Patti's house. Her mum allowed her to go because she promised to clean her room when she returned.

    While dancing, singing and talking, the girls worked. One hour later, the room became clean. It was fun! The room looked great. Patti's mum was happy. She called Meg's mum and told her everything. Meg's mum said Patti could come to help Meg.

    The girls quickly went to Meg's house. They worked and played until the room was clean. The girls learned that working together could make cleaning fun and easy!