【单选题】Ben looks rich. _______, he is very poor. [ ]
【单选题】I don't like Jackie. ,I don't like action movies. [ ]
【单选题】聆听的最高层面是:( )
B.
听懂对方为什么说这句话以及为什么此时此地说这句话
【单选题】He looks rich. _____, he is very poor. [ ]
【简答题】某压电式压力传感器的灵敏度为 80pC/Pa ,如果它的电容量为 1nF ,试确定传感器在输入压力为 1.4Pa 时的输出电压。
【单选题】The boy looks stupid, but _____ he is smart. [ ]
【简答题】某压力测量系统由压电式压力传感器-电荷放大器-记录仪组成。若压力传感器灵敏度为10PC/kPa,电荷放大器的灵敏度为0.5V/PC,记录仪的灵敏度为20mm/V,则系统总灵敏度为 。
【单选题】The committee leader's explanation sounds ______ , but the members are not sure they believe it.
【简答题】某压电传感器灵敏度 S1=200nc/Mpa,将它与增益为 1 mV/nc 的电荷放大器相连, 放大器输出接到一个灵敏度为 2mm/V 的笔式记录仪上,试计算这个系统的总灵敏 度为多大?当压力变化为 30Mpa 时,记录笔在记录纸上偏移量是多少?