ZigBee():增加或者删除一个节点,节点位置发生变动,节点发生故障等等,网络都能

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问题:

ZigBee():增加或者删除一个节点,节点位置发生变动,节点发生故障等等,网络都能够自我修复,并对网络拓扑结构进行相应的调整,无需人工干预,保证整个系统仍然能正常工作。

A、自愈功能

B、自组织功能

C、碰撞避免机制

D、数据传输机制

考点:电子与通信技术物联网技术与运用物联网技术与运用题库
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4的平方根等于______.

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不属于典型世界食物结构模式的是()

A.中国模式

B.日本模式

C.发展中国家模式

D.经济发达国家模式

E.以上都不是

题型:单项选择题

Sitting in the play area of the doctor's office, my children, Paul, four, and Bailey, three, built a Lego tower while we w小题1:to be called for Paul's examination.

"Good job, you guys, "I said, trying not to s小题2:too tired. My husband was away on business, and it was difficult being a 小题3: with the kids. "Don't put the Lego in your mouth, Bailey, " I said. Paul grabbed it from him. "That's not nice, Paul, " I said. He gave back the Lego. I looked around and saw an old gentleman in a c 小题4:was reading something, I wished I could sit q 小题5:for a while. I wanted to be able to take a rest, or go shopping alone. At once, I was ashamed of myself. What kind of mother was I?" God, " I thought, "help me to be the very best mom I can be." The nurse came into the waiting room to get us. Just at that moment, the old gentleman in the waiting room put down his m 小题6:and came up to me. With a smile on his face, he said, "Your children are  l 小题7:to have such a wonderful mother." "Thank you, "I replied in a low v小题8:and watched him walk back to his seat. We f 小题9: the nurse into the examination room. While she weighed Paul, I told her how that man had made my day.

Now when I feel tired I remember the encouraging w 小题10: of the old gentleman.

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不同面制品对原料面粉的要求及面粉品质不符合要求时应采取的改进措施

题型:单项选择题

带土壤的植物繁殖材料在进境前20~45日办理备案。 ( )

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