Fred is a bus driver. He always drives the number 14 bus. Fred's bus goes 1the shopping mall on High Street to the park on Queen Street, then 2to the shopping mall. Fred3work at six o' clock every morning.4 bus leaves the shopping mall at ten past six. Fred is sometimes5 to work. When he is early, he sits in his bus and6the newspaper until it's time to go. Fred always stops for 7on the bus because he has to finish work at three o'clock in the afternoon. He doesn't go home by bus. He 8 ! He thinks it's really good for his health. Fred loved his 9 because he can meet different people every day. And he is very10. So the people who travel on Fred's bus like Fred very much.

“冲动是魔鬼，冲动是炸弹里的火药，冲动是一种吃不完的后悔药”这句话告诫我们在意志品质方面要增强（    ）

为探究某些生态因素在生态系统中的作用，有人设计了如下实验：

①在四个大小形状相同的瓶中加入等量的清水，另外向C、D瓶中加入等量的相同河泥．

②向B、C、D中放入等量的生长状况相近的绿色植物水草

③向四个瓶中放入大小形状和生长状况相近的小鱼各两条．

④把A、B、C瓶置于阳光下，D瓶放在黑暗的环境中．

实验装置如图所示，请分析回答下列问题：

①2NO（g）+O₂（g）⇌2NO₂（g）

②2NO₂（g）⇌N₂O₄（g）

测得NO₂和N₂O₄的浓度变化如图所示，0～10min维持容器温度为T₁℃，10min后升高并维持容器的温度为T₂℃．下列说法正确的是（   ）