每只回火防止器,在使用小型焊割时炬时,焊炬数一般不得超过2把。 ()
参考答案:错
热敏电阻在现代自动控制技术中有着广泛的应用,某校的科学兴趣小组对热敏电阻的温度特性进先研究.他们设计了如图所示的电路,测得热敏电阻R,在不同温度下的阻值,实验得到的数据如下表所示.
(1)第3次实验时电压表电流表指针位置如图所示,己知电压表的量程为3V,电流表的量程为0.6A,请把测得的电压值、电流值及求得的电阻值填入表中.
(2)根据实验得到的结论:该热敏电阻的阻值随温度升高而_________.
A company uses cash to pay off a short-term notes payable. If the company’s current ratio before the transaction is 2.0 times and the quick ratio was 1.0 times, how would this transaction affect the company’s current, quick and debt ratios Current ratioQuick ratioDebt-to-equity ratio()
A. Increase Increase Decrease
B. Decrease Decrease Increase
C. Increase Remain unchanged Decrease