题目内容

频率600MHz布线系统永久链路的最小近端串音功率值应符合()。

A. 65dB
B. 62.0dB
C. 57.4dB
D. 51.7dB

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按照会计准则的规定,下列项目中,不应确认为收入的是()。

A. 出售原材料取得的收入
B. 设备出租收入
C. 违约金收入
D. 销售商品收取的不含税价款

发生接地故障时人体距离接地体越近,跨步电压越高,越远越低,一般情况下距离接地体()m跨步电压视为零。

A. 10以内;
B. 20以外;
C. 30;
D. 40。

水锤波的传播速度与管壁材料、管壁厚度、管道直径及水的弹性模量有关,其中与管壁材料特性的关系最为密切

A. 正确
B. 错误

An administrator needs to be able to list the number and size of backup sets on a tape. Which of the following procedures accomplish this()

A. Use the tcopy /dev/rmtl until an end-of-tape error notification is received.
B. Use the cpio -idmv < /dev/rmtl until an end-of-tape error notification is received.
C. Use the tar -tvf /dev/rmtl repeatedly until an end-of-tape error notification is received.
D. Use the dd if=/dev/rmt0.1 bs=128k count=EOT until an end-of-tape error notification is received.

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