题目

下列哪种细胞的全能性最容易表达出来? A．青蛙的口腔上皮细胞       B．蚕豆的叶肉细胞 C．大白鼠的肝脏细胞      D．人的神经细胞 答案：BDesipt the fact that there was a big ______ over the meeting, it seemed that a good many of the invited guests would still attend it.  A．controversyB．comparisonC．agreementD．contribution