问题
单项选择题
下列试剂与薄层色谱法测糖精钠无关的是（）。
A、CuSO4
B、NaOH
C、氨水
D、溴甲酚绿
答案
参考答案：D
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下列试剂与薄层色谱法测糖精钠无关的是（）。
A、CuSO4
B、NaOH
C、氨水
D、溴甲酚绿
参考答案：D
A few months earlier I had been painting two portraits for each of my parents．I'd planned to give them the portraits as Christmas gifts．This would be a 36 for everyone，as I had not studied 37 ． While painting one day, I was surprised by a knock on the door. Quickly having put all my 38 materials out of sight, I opened the 39 . To my astonishment, my father came in . Immediately I wanted to show him the paintings, but I was 40 to destroy his Christmas surprise. Yet something 41 me to share the gifts with him. After making him promise to keep it secret, I 42 he keep his eyes closed until I had the portraits set on easels(画架). “Okay, Daddy. Now you can 43 !” He appeared dazed at first. Finally , he said, “I don’t believe it. The eyes are so 44 that they follow you everywhere—and look how 45 your mother is. Will you let me have them 46 ?” Excited with his response, I happily volunteered to 47 them to the frame shop the next day. Several weeks passed. Then one night the 48 rang—my father had a stroke(中风). He died the next day, and it seemed all 49 escaped from the life of my mother and me . I finally remembered to 50 about the framed portraits. I was surprised when the shopkeeper told me my father had visited the shop, 51 for the framing and had them gift-wrapped. 52 we had lost our loved people, everyone gathered on Christmas Day making an effort to be 53 . As I looked into my mother’s sad eyes and unsmiling face, I decided to give her Daddy’s and my 54 . After she saw it, with a wide smile, she quickly said, “I knew Daddy would be with us on Christmas Day!” I glanced at the gift card written in my father’s 55 . “ Mother—Our daughter reminded me why I am so blessed. I’ll be always looking at you.—Daddy.”
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