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玻璃干燥器的使用注意事项是什么?

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变压器储油柜检修时,保持连接法兰的平行和同心,密封垫压缩量为()。

A. 1/3
B. 1/4
C. 1/5
D. 2/5

How does weighted random early detection (WRED) prevent packet loss?()

A. increases link capacity
B. increases buffer space to accommodate bursts of traffic from delay-sensitive applications
C. provides prioritized forwarding for drop-sensitive applications
D. drop lower priority packets before congestion occurs
E. separates traffic into as many as 64 queues that can be uniquely prioritized

轴肩槽采用局部放大的表达方法,不利于对其几何形状的了解和尺寸标注。

A. 正确
B. 错误

OFDM可以在不同的频带采用不同的调制编码方式,更好的适应频率选择性衰落

A. 正确
B. 错误

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