A.They complete all their assignments.
B.They study hard for his tests.
C.They compete for the best seats in the class.
D.They read all his books.
第1题
A.2个主要区带和2~4个或更多次要区带
B. 1个主要区带和2~4个或更多次要区带
C. 3个主要区带和2~4个或更多次要区带
D. 4个主要区带和2~4个或更多次要区带
E. 5个主要区带和2~4个或更多次要区带
第6题
用琼脂糖凝胶电泳法测定血清乳酸脱氢酶同工酶,其区带为
A.1条
B.2条
C.3条
D.4条
E.5条
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