题目内容

Directions:This section is to test your ability to understand short conversations. There are 8 recorded conversations in it. After each conversation, there are some recorded questions. Both the conversations and questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given below.Conversation 1(2019.6)

A) Heisawayonbusiness.
B) Heishavingameeting.
C)Heisvisitingaclient.
D) Heisonsickleave.

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Conversation 1(2019.6)

A)Hisflighthasbeencancelled.
B)Hehastomeethislawyer.
C)Hewasinjuredinanaccident.
D)Heissufferingfromafever.

Conversation 1(2019.6)

A)Holdingatelephonemeetinginstead.
B)HavingitatthesametimenextMonday.
C) Askingtheir assistants to attend it.
D)Puttingitoffuntilnextmonth.

测速发电机的输出特性是( )。

A. 输出电压与转速成正比
B. 输出电压与转角成正比
C. 转速与脉冲量成正比
D. 转速与脉冲频率成正比

数字显示电子表是一个微型的步进电机。

A. 对
B. 错

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