根据句意和首字母提示，完成短文。

    My school is on Zhongyang S____. It is only about half an h____ on foot from my home. And if I r____ there, it takes l____than ten minutes. Every morning, I go along Zhongshan Road by bike and take the second turning on the left. It's not f____, so I don't have to get up too e____. Sometimes when it rains, I take a bus to school. I get off at the bus s____. It's just n____ to our school gate.

    It's good to live near the school. But there is a p____. There is usually too much t raffic in the afternoon. And I hate w____ for a long time on my way home.

 如图所示，将盛有适量水的容器放在水平桌面上，然后把系在弹簧测力计下的铁块慢慢地浸入水中（水未溢出），观察铁块从刚开始浸入水中到完全浸在水中的实验现象，并对一些物理量做出了如下判断：①铁块受到的浮力变大；②弹簧测力计的示数变小；③桌面受到的压力变大；④水对容器底部的压强变大．其中正确的是（　　）

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下列关于植物类群的叙述中，不正确的是（　　）