台架式变压器安装时，避雷器的接地端、变压器的外壳及低压侧中性点用截面不小于（）的多股

完形填空。

Ever since I was little, my favorite season was winter. I loved to play in the snow and enjoy the hot chocolate.        1 , winter never gave me the special gift of snow on my birthday. I would ask my grandmother  2  it didn't snow on my birthday. She would laugh and tell me I asked too many questions.  3  one day, she promised (许诺) that she would make it snow on my next birthday.           That year,  4  my birthday, my grandmother died. I was sad but angry because she had promised to make it snow. The day of my sixth birthday, I woke up and ran to the window,  5  to see just one snowflake. But there was no snow. I felt mad at my grandmother. She had broken a promise.      By my sixteenth birthday, I  6  all hope of getting my snow, even though I still wished for  7 . During my party, I stayed with my friends and family and was truly happy. I  8  the best time ever! Then I saw the white snow  9  down all around. I was so excited that I ran around screaming (尖叫) and laughing. My friends all laughed  10  me, but I didn't care.      When I  11  home, my grandpa said he had a gift for me. I was  12  because he had given me a gift. It was a small white box, which looked old. I opened it. There was a crystal snowflake (水晶雪花) with a card that  13 , "Happy Birthday."       How could this be? My grandpa said it was my grandmother's final  14  on my "sweet sixteenth". I cried.       I was  15  that my smiling grandmother angel was and had been watching over me.

( )1. A. Certainly    ( )2. A. when         ( )3. A. But          ( )4. A. on           ( )5. A. hoped        ( )6. A. was losing   ( )7. A. it           ( )8. A. had          ( )9. A. fell         ( )10. A. with        ( )11. A. arrived at  ( )12. A. excited     ( )13. A. wrote       ( )14. A. order       ( )15. A. certain     B. Unfortunately B. how          B. Or           B. after        B. hoping       B. lost         B. her          B. was          B. to fall      B. at           B. remained     B. confused     B. said         B. mistake      B. angry        C. Importantly C. whether    C. Then       C. before     C. to hope    C. would lose C. him        C. played     C. fallen     C. from       C. got        C. pleased    C. explained  C. wish       C. sad        D. Luckily   D. why       D. So        D. in        D. hope      D. had lost  D. me        D. feared    D. falling   D. off       D. entered   D. frustrated D. appeared                           D. decision  D. anxious

某物质R，燃烧反应的化学方程式为：R+3O₂

点燃  .

2CO₂+3H₂O，则R所含的元素为（　　）

A．只有碳、氢两种元素

B．有碳、氢、氧三种元素

C．一定有碳、氢两种元素，可能有氧元素

D．不能确定

砾石充填施工，充填结束压力应该比正常充填压力高（）。

A、3.5～7.0MPa

B、7.0～9.0MPa

C、9.0～12.0MPa

D、12.0～15.0MPa

农业企业主要贷款渠道或机构包括（）。

A.中国农业银行

B.农村商业银行

C.农业发展银行

D.民间金融机构

E.商业信用

下列脏腑中与厌食最为相关的是( )

A．心与小肠
B．肺与大肠
C．脾胃
D．肾与膀胱
E．肝胆