早在2013年，我国“嫦娥三号”飞船成功着陆月球虹湾区，并释放月球车，如图，下列有关说法正确的是（　　）

牵牛花中，叶子有普通叶和枫形叶两种，种子有黑色和白色两种．现用普通叶白色种子纯种和枫形叶黑色种子纯种作为亲本进行杂交，得到的F₁为普通叶黑色种子，F₁自交得F₂，结果符合基因的自由组合定律．下列对F₂的描述中错误的是（    ）

    2014 is the year of horse in China. Do you know anything about the horse?

    The horse is strong and runs very fast. He's a useful and hard-working animal. The horse learns to know his owner soon. He loves his owner, even after his owner loses his life. Here's a story about such a horse. In a war, the owner passed away(死), and fell from his horse. When people found his body some days later, the horse was still standing beside it. During that long time, the horse didn't leave the body of his owner, without food or water, in the coldest weather, driving away the birds that might eat it. Wasn't he a great animal?