工蜂的腹部有黑黄相间的横纹,这种现象生物学上称为()。 发布时间:2018-05-17 23:16 │ 来源:www.tikuol.com 题型:填空题 问题: 工蜂的腹部有黑黄相间的横纹,这种现象生物学上称为()。
题型:填空题 _______cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.A.WhileB.WhenC.SinceD.if only 查看答案