变频器常见的各种频率给定方式中，最易受干扰的方式是（）方式。A、通信方式给定B、键盘

(At Green Street Police Station)    A=policeman   B= woman
A: Excuse me. ___1___?
B: Yes, it's about my daughter. She goes to school in the morning and comes back home at five
    o'clock in the afternoon every day. But now it's six o'clock. She doesn't come back now.
A: Your daughter? ___2___?
B: Her name is Nancy, Nancy Brown.
A: ___3___?
B: She is eight years old.
A: ___4___?
B: She is a little bit thin and medium build. She has curly blonde hair and blue eyes. She is wearing
    a green coat, blue pants and black shoes today.
A: ___5___?
B: No, she isn't at school. I call her teacher, Miss Green. She says Nancy leaves school at 4:55.
A: OK, Mrs. Brown. We will do our best (尽力) to look for her. We will call you if we find her.
B: Thank you.