I  have a good friend． 1  name is Peter．We study in Beijing Sunshine Secondary Schoo1．We are in the same(同一个)class．He sits in front of  2  ．His favourite lesson is Music．He   3  many CDs．He likes  4   music very much．He likes playing football，t00．After school we  often   play  football in the  5   ．He is very helpful．We often help each   6  ．

Peter  is  not a Chinese．He is from   7   ．He comes to Beijing  8    his family．His father is  a doctor and his mother is a nurse．They work from Monday        9    Friday．At weekends，his mother  likes shopping and his father likes fishing．Sometimes they go to the park．They all like Chinese  food．They    lO    very happy．

1．A．He    B．His    C．She

2．A．I    B．my    C．me

3. A．have    B．has    C．there is

4．A．1isten    B．1isten to    c．1istening to

5．A．classroom    B．library    c．playground

6．A．one    B．other    C．others

7．A．England    B．Chinese    C．Eng]ish

8. A. from    B．on    C．with

9．A in    B．to    C．with

10. A．be    B．am    C．are

）分雷蒙德·戴维斯因研究来自太阳的电子中微子(ν_e)而获得了2002年度诺贝尔物理学奖。他探测中微子所用的探测器的主体是一个贮满615t四氯乙烯(C₂Cl₄)溶液的巨桶．电子中微子可以将一个氯核转变为一个氩核，其核反应方程式为已知核的质量为36.95658u，核的质量为36.95691u，的质量为0.00055u，1u质量对应的能量为931.5 MeV。根据以上数据，可以判断参与上述反应的电子中微子的最小能量为

A．0.82 MeV

B．0.31 MeV

C．1.33 MeV

D．0.51 MeV