【简答题】执行以下代码,输出结果是()? A. a B. 一个错误警告 C. 一个致命性的报错 D. 空
【简答题】在RLC串联的正弦电路中,已知R=1kΩ,L=10mH,C=0.02uF,电容两端电压uc(t)=20sin(10 5 t-40°)V,如上图所示,求电流I和电源电压U s 。
【单选题】According to the professor, why do death rituals include roles for friends?
A.
Friends are more creative in performing rituals.
B.
Friends give support and comfort to the family.
C.
Friends are expected to pay the funeral expenses.
D.
Friends experience less grief than the family does.
【判断题】1945年的5月8日,纳粹德国宣布了无条件投降,这一天也是反法西斯战争胜利的纪念日。