What does Peter worry about when doing his job?
A. His courage.
B. His family.
C. His colleagues.
D. His safety.
查看答案
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
以下不属于CC2530端口的输入模式的是( )。
A. 上拉
B. 下拉
C. 上下拉
D. 三态
微信支付 
支付宝支付