【单选题】The article had been hacked about so much that it was scarcely recognizable.
【简答题】石英晶体的性能非常稳______。在20~200°C的范围内的压电常数的温度变化率只有- 0.0001/°C。石英晶体的缺点是:压电常数较______。多用于标______传感器、高准确度测量或使用温度较______的传感器。
【单选题】根桥发生故障后会重新选举其它交换机为新的根桥。那么原来的根桥恢复正常后又会如何?
【单选题】Jack had feeling of excitement when hearing his article had been published in school magazine.
【简答题】根据商不变的性质填一填。 0.12÷0.03=( )÷3 0.28÷0.07= ( ) ÷7
【简答题】石英晶体的性能非常 ______ 。在 20 ~ 200 °C 的范围内的压电常数的温度变化率只有 - 0.0001/ °C 。石英晶体的缺点是:压电常数较 ______ 。多用于标 准 传感器、高准确度测量或使用温度较 ______ 的传感器。
【简答题】根据商不变的性质填一填。 0.01÷0.16=( )÷16 0.314÷( )=31.4÷18
【单选题】Unit 2-13 . The article had been hacked about so much that it was scarcely recognizable.