题目

29．下列细胞中，属于死细胞的一组是（   ） A．木纤维和人皮肤的角质层细胞                   B．导管和花粉   C．木纤维和抗体                                           D．抗体和花粉 答案：ASometimes, children's ideas are not the sametheir parents'. It's difficult for them to agree with each other.A.onB.withC.asD.of