【单选题】【消耗次数：1】
放大倍数、衰减量、灵敏度等属于（ ）。
①
电路性能的测量
②
特性曲线的测量
③
电信号特性的测量
④
电能量的测量
参考答案：
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以下（ ）项可以提高应变片测量电桥的输出电压灵敏度。
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在应变片功率范围内降低电桥供电电压
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不受应变片功率限制提高电桥供电电压
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不受应变片功率限制降低电桥供电电压
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在应变片功率范围内提高电桥供电电压
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以下（ ）项可以提高应变片测量电桥的输出电压灵敏度。
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在应变片功率范围内降低电桥供电电压
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不受应变片功率限制提高电桥供电电压
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不受应变片功率限制降低电桥供电电压
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在应变片功率范围内提高电桥供电电压
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