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放电电阻______ ______ ,脉冲光反馈电荷灵敏前置放大器______ ,漏反馈电荷灵敏前置放大器______ ,晶体管复位电荷灵敏前置放大器______
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信号堆积会使信号的基线发生涨落,即使无尾堆积的脉冲通过CR网络时,由于电容在放电时间内不能把电荷量充分释放,下一个脉冲到达时剩余电荷会引起新脉冲基线偏移______ 。有CD型、CDD型、开关型和门控型四种______ 。
静态时,各点电位为0电位______ ;有如图所示正脉冲输入时,V2电压升高D1截止,D2导通,V1为0电位,V3与V2相同______ ;输入信号过了峰值后,V2电压低于V3电压,D2截止,此时A作为比较器,A的同相端电压低于反相端,V2为负电压,D1导通,V1为负电压,D2截止,V3为峰值电压______ ;门控信号过来后,开关S闭合,电容电荷量快速释放,V3降低,直到0电位,此时恢复至初始状态______ 。
根据探测器输出信号成形方式的特点分类,前置放大器可以分为((______ ))( )((______ )) 、((______ ))( )((______ ))(()( )((______ ))。
57. 分析下列句子的代词Giraldo expected the older ants to perform poorly in all these tasks. But the elderly insects were all good caretakers and trail-followers—the 95-day-old ants could track the scent even longer than their younger counterparts. They all responded to light well, and the older ants were more active. And when it came to reacting to prey, the older ants attacked the poor fruit fly just as aggressively as the young ones did, flaring their mandibles or pulling at the fly’s legs.(1) counterparts 指代______ (2) They 指代______ (3) ones 指代______ (4) their 指代______
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