Why does Peter take the Greek hero Leonidas as his hero?
A. Leonidas lost his life for his countrymen.
B. Leonidas was the king of Sparta.
C. Leonidas was the hero in the film 300.
D. Leonidas knew the danger in advance.
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What does Peter worry about when doing his job?
A. His courage.
B. His family.
C. His colleagues.
D. His safety.
What does Peter learn from his hero?
A. To be fearless in the face of danger.
B. To be loyal to his countrymen.
C. To be a man of will and power.
D. To be a man who inspires others.
以下属于ZigBee技术优点的是( )。
A. 远距离
B. 低功耗
C. 高数据速率
D. 低容量
TI公司提供的基于CC253x芯片的的BasicRF软件包,不包括( )。
A. 硬件层
B. 基本无线传输层
C. 数据交互层
D. 应用层
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