血清学检测时，电解质浓度通常是（）。
A.2%（NaCl）
B.10%
C.5%
D.0.9%
E.1.5%
参考答案：D
_____ there is no restriction on foreign films, those that win at the Academy Awards are in the minority.[ ]
A. As
B. Despite
C. While
D. When
金属磁性材料生产方法有（）。
