题目内容

Listen to the dialogue in the grocery store.

A. She only has a few items, so she doesn’t need a bag.
B. She doesn’t want to hold Fred up at the cash.
C. She doesn’t want to pay for the bags.
D. She is trying to help the environment.

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Listen to the report about a seasonal disorder. Q: What condition is most likely being described?

A. Seasonal allergies.
B. A cold.
C. Poison ivy.
D. Lack of exercise.

Listentothemonologueaboutmentalhealthandtechnology. Q: What statement sounds most true based on the text?

A. Technologycausesdepressionandsuicidalthoughts.
B. Teenagersspendtoomuchtimetalkingontheirphones.
Constantlycomparingyourselftootherscanmakeyouunhappy.
D. Talkingonthephoneisnotsocializing.

关联参考方向下,电阻在交流电路中的电压、电流同相

A. 对
B. 错

总电压超前总电流270°的正弦交流电路是一个纯电感电路。

A. 对
B. 错

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