简述骨素的生产步骤。
参考答案：
原料验收、粉碎、提炼、静置分离、过滤、浓缩、调和。
In 1911, Madam Curie received a second Nobel Prize for her research, the first person in the world ______ two Nobel Prizes.
A．receiving
B．received
C．to receive
D．being received
卵巢上皮性恶性肿瘤的主要转移途径是（）
A．直接蔓延
B．淋巴转移
C．血行转移
D．直接蔓延和种植
E．直接蔓延和淋巴转移
