清朝主体的军事制度称为（）。
A、府兵制
B、世兵制
C、募兵制
D、八旗制度
参考答案：D
.Jack came from a poor family, so his parents had to______a lot to pay for his education. (潍坊市)
A．accuse
B．qualify
C．purchase
D．sacrifice
原始凭证
