【单选题】图示运放电路双向稳压管 D Z 的稳定电压为 ,忽略稳压管的正向导通压降, 且 U Z 值小于运放的饱和电压值 U O (sat) ,当 u i< u R 时, u O 等于 ( )。
【单选题】图示运放电路双向稳压管 D Z 的稳定电压为± U Z ,且 U Z 值小于运放的饱和电压值 U o(sat) ,当 u i < u R 时, u o 等于 ( ) 。
【单选题】电路如图所示,运算放大器的饱和电压为 ± 12V ,双向稳压管 D Z 的稳定电 压为 8.6V ,当输入电压 u I =2V 时,输出电压 u O 应为 ( ) 。
【简答题】Fill in the blanks with the proper form of the words given in brackets. (用括号中所给词的适当形式填空) 11. When you are (relax) ________, your breathing tends to be slow and gentle. 12. Bill Gates was born into a (...
【简答题】_________ every student aware of the importance of study, they would study efficiently A. Were B. Should C. May D. Had 12. Hardly ____ when it began to rain. A. had he arrived B. arrive...
【单选题】甲公司确认办公用楼租金60万元,用银行存款支付10万元50万元未付。按照权责发生制和收付实现制分别确认费用为多少万元
【单选题】图示运放电路双向稳压管 D Z 的稳定电压为 ,忽略稳压管的正向导通压降, 且 U Z 值小于运放的饱和电压值 U O (sat) ,当 u i< u R 时, u O 等于 ( ) 。
【单选题】甲公司确认办公用楼租金60万元,用银行存款支付10万元,50万元未付。按照权责发生制和收付实现制分别确认费用( )万元
【简答题】为什么说买麻藤纲是裸子植物中最进化的类群?