2018-2022 英语周报 八年级 牛津HNX 5答案

第二节One possible versionFinally, as his sob quieted, his mother pulled back to look athim. " Rex, take the bird to Mr. Blake and tell him what happened.You will never have peace if you dont face him. Mr. Blakedeserves to know the truth she said with a firm look. The walk toMr. Blake's house was difficult. Leaving his mother in the yardRex stepped to the front door with the dead turkey. He knockedhoping Mr Blake wouldnt answer. But the door openedHi, Mr: blake, Rex handed him the dead bird. When he toldthe whole story of how he killed the turkey by mistake, Rex lookedat the ground, too frightened to look up there was a momentssilence and then Mr. Blake said, Thats all right. We'll eat it fordinner today. A smile appeared on his face. Rex couldnt believewhat he had heard. As he ran home he felt as if a rock had beenlifted from his shoulders. He realized that doing the right thing wastruly easy in the end

21.(除注明外,每空1分,共11分)(1)协助扩散协助扩散是顺浓度梯度运输,不需要消耗能量,而主动运输是逆浓度梯度运输,需要消耗能量(2分)(2)①细胞体积大,易于进行显微操作(合理即可,2分)②实验思路:将爪蟾卵母细胞均分为甲、乙两组,甲组爪蟾卵母细胞中注入含水通道蛋白的mRNA样液,培养该卵母细胞,让其合成水通道蛋白,乙组爪蟾卵母细胞只注入等渗样液,一段时间后,将它们放入低渗溶液中,测定并比较甲、乙两组的水导度及卵母细胞发生破裂的时间等(3分)预期结果:甲组卵母细胞水导度明显高于乙组,甲组卵母细胞发生破裂的时间明显早于乙组(3分)

以上就是2018-2022 英语周报 八年级 牛津HNX 5答案，更多英语周报答案请关注本网站。