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什么时高速公路？高速公路有哪些特点？

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航空器遇紧急情况时，通话呼叫术语为：（）.

A. MAYDAY
B. PANPAN
C. EMERGENCY
D. URGENCY

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关于阻塞性肺气肿，哪一项描述是正确的（）。

A. 经积极治疗可以痊愈
B. 仅限于肺泡弹性减退与膨胀
C. 其病理改变不完全可逆
D. α-抗胰蛋白酶增加易发生肺气肿
E. 肺功能改变主要是肺活量减少

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情景记忆

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What is the purpose of the inverse ARP?（）

A. to map a known DLCI to an IP address
B. to map a known IP address to a MAC address
C. to map known SPID to a MACaddress
D. to map a known DLCI to a MAC address
E. to map a known IP address to a SPID
F. to map a known MAC address to an IP addre

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