①利于实现我国的可持续发展       ②表明不必再坚持计划生育的基本国策

③表明我国人口分布不均衡           ④是对计划生育政策的调整和完善

阅读下列短文，从每小题的三个选项中选出最佳答案

      It is morning now. Look at the sun, it rises in the east(东方). Look at the tree, the shadow is long. It is noon now. The sun is high in the sky. It is very hot. Look at the tree. The shadow is short. It is evening now. The sun goes down in the west(西方). Look at the tree, the shadow is long again. It is night now. The moon is high in the sky. There are some stars in the sky too.

①弄清自己的真实需要      ②考虑目标的重要性和实现的可能性

③照搬别人的成功模式      ④总结成功的经验和失败的教训，提高选择能力

如图为某植株花的结构示意图，已知该植株的基因型是Aa，在自花传粉的情况下，判断下列说法错误的是（    ）