问题
选择题
鲫鱼、蝴蝶、母狮和草履虫进行运动所依赖的主要结构分别是
A．鳞片、翅、四肢和伪足
B．鳍、翅、四肢和伪足
C．鳞片、翅、四肢和纤毛
D．鳍、翅、四肢和纤毛
答案
答案：D
鱼类的运动器官是鳍，昆虫的飞行器官是翅，母狮是哺乳类，用四肢在草原上运动，草履虫用纤毛运动。
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鲫鱼、蝴蝶、母狮和草履虫进行运动所依赖的主要结构分别是
A．鳞片、翅、四肢和伪足
B．鳍、翅、四肢和伪足
C．鳞片、翅、四肢和纤毛
D．鳍、翅、四肢和纤毛
答案：D
鱼类的运动器官是鳍，昆虫的飞行器官是翅，母狮是哺乳类，用四肢在草原上运动，草履虫用纤毛运动。
用方框中所给词语的适当形式填空，每词限用一次。
When she was a child, once she小题3: to her friend’s birthday party. She was pleased but also sad because she didn’t have enough money to buy a gift for him. Later that night she was in bed, worrying about the gift when the door 小题4: and in came her grandma. “What happened?” her grandma asked. Hearing the girl’s 小题5: , she said, “Don’t worry. I think I can help you. How about singing a song? Happy birthday to …” What a beautiful song! She sang and sang. Suddenly she 小题6: . It was a dream! She decided to write it down 小题7: and sing it to her friend at the party. When she sang the song at the party the next day, her friend was very happy . “How 小题8: you sing! It is the most beautiful song that I have ever 小题9: before! Thank you for giving me the special 小题10: !” he said. And they learnt to sing it together. Later the girl became well-known in Americ |