题目

下列属于不遗传的变异的是     A．小明用眼不当导致近视眼     B．豌豆粒有绿色的，有黄色的     C．某色觉正常的夫妇生下一个色盲的儿子     D．宠物狗有长毛的，有短毛的 答案：AIn his talk, the____ Prime Minister expressed his satisfaction, ____ that he had enjoyed his stay here.      [     ]A. visiting, add               B. visited, adding   C. visiting, adding            D. visited, added