“贞观之治”是中国古代史上为政宽容、对外开放和国力强盛的时期，此局面的形成得益于（   ）的英明统治。

某小岛上生活着两种棕榈科植物，研究认为：200万年前，它们的共同祖先迁移到该岛时，一部分生活在pH较高的石灰岩上，开花较早；另一部分生活在pH较低的火山灰上，开花较晚。由于花期不同，经过长期演变，最终形成两个不同的物种。根据现代生物进化理论分析，正确的是

通读下面短文，掌握其大意，然后在每小题所给的四个选项中，选出一个最佳答案。

    It's a fine Saturday morning. There are many people in the park. Many of 1  are young and some are old.

    Some children are 2  games over there. Two boys are playing  3 their toy bats. There is a lake in the park. The water is 4  .  There are some 5  on the lake.  6  the lake a young man is reading. There is a house near the lake. Beside 7 house two men are working. Look at that big tree! There are some birds 8  it. Under it are some men. Four of them are playing cards. One of them is looking at two cats. The cats are 9 up the tree. What do they 10  to do? They want to catch the birds.

玲玲还写了绘制校园平面图的工作步骤：①标注文字和注记；②根据比例尺和图例绘图；③设置所表示事物的图例，如楼房、运动场、校门、校道、绿地、水池等；④根据校园的实际，确定平面图的方向；⑤用卷尺测量校园周边距离，选择合适的比例尺。

 结合上述活动过程，解决下列问题：