题目内容

电路开路时,相当于电源负载无穷大,因此电路中()为零。

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After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate re-firing of a burner in order for the ().

A. furnace to be re-purged
B. electric charge to buildup in the igniter
C. fuel pump to restart
D. drum level to stabilize

把下列各数化成十进制数:101.10011B,22.2O,AD.4H

现代汉语中的词和句子成分是一一对应的。

A. 正确
B. 错误

海面有油火时,跳水不可穿()。

A. 棉毛衣服
B. 化纤织物
C. 防火衣服

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