根据短文内容，完成下列任务。

The picture that sits on my desk in my bedroom is my favourite. (A)When I have trouble studying, or I’m worried about an exam, I always take a look at it. It is a picture of my best friends taken three years ago when we were in middle school. It reminds(使……想起) me of the good time we’ve shared and the support(支持) their friendship still gives me today. Our lives have gone in different directions, (B)_______ our friendship we created has kept us close. Every week I get a message on my answering machine from one of them, or a letter in the mail with the latest news or vacation photos. I often get an email with a joke for the day or words of comfort about some problems in my life. My friends often show up for surprise birthday parties, and one of them (C)_______ travelled two hours from the other end of town just to watch my first English speech contest. Our friendship has carried me through a lot of difficult experiences, and has enriched the good ones.

任务一：简要回答下面的问题。

小题1:Where is the picture?                                

小题2:When was the picture taken?                              

任务二：将A处画线句子翻译成汉语。

小题3:____________

任务三：在B处和C处填入一个适当的单词。

小题4:B: __________

小题5:C: __________

红外与拉曼光谱的特点是什么？