化学就在我们身边，通过一年的学习，我有了许多收获：

They ____ ____ in the kitchen.

用光子能量为E的单色光照射容器中处于基态的氢原子．停止照射后，发现该容器内的氢能够释放出三种不同频率的光子，它们的频率由低到高依次为ν₁、ν₂、ν₃，由此可知，开始用来照射容器的单色光的光子能量可以表示为：①hν₁；②hν₃；③h（ν₁+ν₂）；④h（ν₁+ν₂+ν₃） 以上表示式中（   ）

    Some years ago,writing in my diary used to be____usual activity. I would return from school and spend half an hour ____(record)the day's events, feelings, and ____(impress)in my little blue diary. I did not really need ____(express) my emotions by way of words, but I gained a certain satisfaction from ____(see) my experiences forever recorded on paper, After all, isn't accumulating(积累）memories a way of preserving the past?

    ____ I was thirteen years old, I went on a long journey____ foot in a great valley____(equip) with pens, a diary, and a camera. During the trip, I was busy recording every incident, name and place I came across. I felt ____(pride) to be spending my time productively, dutifully preserving for future generations a detailed description of my travels. On my last night there, I ____(walk)out of my tent, diary in hand.