射频通道故障常见原因，下面说法最合理的是（）。
A. 接头、馈线等工艺问题导致
B. 射频单元等硬件故障问题
C. 数据配置问题
D. 以上三种都是
请设计一个汽车互联网保险生态圈的创新流程，并且利用500字文字叙述完成（应用）
天馈类故障描述不正确的是（）。
A. 射频通道故障主要包含从RRU天线口到天线的所有故障
B. CPRI接口故障主要包含从LBBP单板到RRU光接口的所有故障
CPRI接口故障主要包含从WMPT单板到RRU光接口的所有故障
D. GPS故障主要包含从UMPT单板到GPS天线的所有故障
46. What does the author say best schools should do?
A) Prepare students to both challenge and change the divided unequal society.
B) Protect students from social pressures and enable them to face the world.
C) Motivate students to develop their physical as well as intellectual abilities.
D) Encourage students to be ambitious and help them to achieve their goals.
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