根据蛋白质分子的配基专一性进行分离的方法是()
A.离子交换层析
B.凝胶过滤
C.分子筛效应
D.分配层析
E.亲和层析
参考答案:E
You can only be sure of_____you have at present;you cannot be sure of something you might get in the future.
A.that;what
B.what;/
C.which;that
D./;that
培训所需经费高是在职培训的特点之一。