问题
单项选择题 A1型题
下列属于天然高分子材料的囊材是（）
A.明胶
B.羧甲基纤维素
C.乙基纤维素
D.聚维酮
E.聚乙烯醇
答案
参考答案：A
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下列属于天然高分子材料的囊材是（）
A.明胶
B.羧甲基纤维素
C.乙基纤维素
D.聚维酮
E.聚乙烯醇
参考答案：A
I can honestly say it was the best of times and the worst of times．I was joyfully 36 my first Child at the same time that my once-energetic mother was 37 her battle with a brain cancer． For ten years，my courageous mother had fought，but none of the operations or other 38 had been successful．Finally，she became totally 39 unable to speak，walk，eat or dress on her own．As she grew closer and closer to death，my baby grew closer and closer to life．My biggest fear was that their lives would never 40 she and my baby could never 41 each other． My fear seemed 42 ．A few weeks before my 43 date，mother went into a deep coma(昏迷)and doctors said she would never 44 ．So we brought her to her own house．As often as I could，I 45 her about the baby moving inside me．I hoped that somehow 46 inside，she knew． On February 3rd，at about the same time my labor(分娩)started at hospital，the nurse at her house told me the 47 news：Morn opened her eyes，sitting up and smiling．I asked for the phone to be 48 to Morn’S ear． “Morn，you’II have a new grandchild!” “Yes!Yes!I know!” Four words。four _49__ and beautiful words! For the next tWO miracle weeks after I brought Jacob home，she gave US joy，smiling，holding Jacob and speaking to the family in complete 50 Then she quietly slipped back into a coma 51 and was finally free 52 the pain forever． Memories of my son’s birth will always be 53 for me，but it was at this time that I learned an important truth about living． 54 both joy and sorrow are lasting only a short time，and often intertwined(相互纠缠)，love has the 55 to face both．And love can last forever．
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