细胞活力测定时常用的染料为()。
A.锥虫蓝
B.结晶紫
C.革兰染色
D.瑞氏染液
E.吉姆萨染液
参考答案:A
—Who is that boy?
—Oh, he is Li Jing. He is ________ student in our class.
A.funny
B.funnier
C.funniest
D.the funniest
由于东汉的皇帝许多都太小,所以皇后、皇太后的势力就比较强大,尤其是太后。