题目内容

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.

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Listentothemonologueaboutmentalhealthandtechnology.&amp;amp;amp;amp;amp;nbsp;Q: What statement sounds most true based on the text?

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

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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

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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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正弦交流电路中，频率越高则电感越大

A. 对
B. 错

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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.&amp;amp;amp;amp;amp;amp;nbsp;Q: What statement sounds most true based on the text?

关联参考方向下，电阻在交流电路中的电压、电流同相

总电压超前总电流270°的正弦交流电路是一个纯电感电路。

正弦交流电路中，频率越高则电感越大

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

Listentothemonologueaboutmentalhealthandtechnology.&amp;amp;amp;amp;nbsp;Q: What statement sounds most true based on the text?