题目内容

起动机中换向器的作用是将交流电变成直流电。( )

A. 对
B. 错

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起动机主要由直流串励电动机、传动机构和控制装置组成。( )

A. 对
B. 错

Section BDirections:In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C), and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 8 to 11 are based on the conversation you have just heard.[音频]8. Questions 8 to 11 are based on the conversation you have just heard.

A. Informative.
B. Inspiring.
C. Dull.
D. Shallow.

9.Questions 8 to 11 are based on the conversation you have just heard.

A. She types on a keyboard.
B. She does recording.
C. She takes photos.
D. She takes notes.

10.Questions 8 to 11 are based on the conversation you have just heard.

A. It keeps her mind active.
B. It makes her stay awake.
C. It enables her to think hard.
D. It helps her kill time.