根据短文内容完成句子。

     Hello, everyone! I'm new here. My name is Sonia. I'm eleven years old. There are seven people

in my family: my grandfather, my grandmother, my father, my mother, my sister, my brother and I. I

live in Beijing now. I'm a student in No. I Middle School. I have a student ID card.  And its number

is 9988. My telephone number is 3457890. You can call me.

1.  Sonia _____ _____ years old.

2.  In her family, there are _____ people.

3.  Sonia's family is _____ Beijing now.

4.  Sonia is a student in_____ _____ _____ _____.

5.  Her _____ _____  is 3457890.

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₁、₂、₃，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     （   ）

A．h₁

B．h₃

C．h（₁+₂）

D．h（₁+₂+₃）