P31Which one is not true?
A. Harold was the virtual ruler of England though Edward was the king.
B. Harold murdered Edward in the year 1066.
C. William of Normandy could claim the English crown because he said Edward approved him.
D. Edward spoke French.
查看答案
Svein's brother was killed by Ethelred.
A. 对
B. 错
Cnut was the son of Ethelred.
A. 对
B. 错
Cnut was the son of Svein.
A. 对
B. 错
在共射极放大电路中，经过晶体管的信号（）
A. 只有直流成份
B. 只有交流成份
C. 交直流成份都有
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