电流的参考方向就是电流的实际方向。
A. 对
B. 错
____(slave) was the immediate cause of the war.
Bootlegging was an act to make, sell or transport alcoholic liquor ____(legal) for sale.
Virginia Woolf once said: “the history of men's ____(oppose) to women's emancipation is perhaps more interesting than the story of that emancipation itself.”