温度零点调节能补偿由于()变化而引起的()。
参考答案:环境温度;零点飘移
The weather turned out to be fine. I the trouble to carry the umbrella with me.
A.should have taken
B.needn’t have taken
C.mustn’t have taken
D.could have taken
A.当单刀双掷开关与a连接时,电压表的示数为22V
B.当单刀双掷开关与b连接时,电压表的示数为11V
C.当单刀双掷开关与a连接,滑动变阻器触头P向上移动的过程中,电压表的示数不变,电流表的示数变大
D.单刀掷开关由a扳向b时(滑动变阻器触头P不动),电压表和电流表的示数均变大