问题
单项选择题
以PAPS为供体的生物转化反应是
A．葡萄糖醛酸结合
B．甲基结合
C．甘氨酸结合
D．硫酸结合
答案
参考答案：D
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以PAPS为供体的生物转化反应是
A．葡萄糖醛酸结合
B．甲基结合
C．甘氨酸结合
D．硫酸结合
参考答案：D
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| On Sundays my father always wore that dull gray apron after breakfast when Dad always announced, "Go ahead everyone. I'll take care of the dishes!" I suppose it was strange for a boy's father to 1 an apron, but I never thought 2 of it until the day that Dad 3 with tradition. It was the last Sunday in August. My father seemed in an expansive mood as we walked 4 from church together. "Tommy," he said letting my name roll off his tongue. "There comes a time in every boy's life when he must take on 5 ." "Responsibilities?" I asked. "Yes. It's 6 that you took a greater role in the household. Starting today, I want you to do the dishes on Sunday morning 7 your mother and I can work the crossword puzzle together." "The dishes?" "Anything 8 with taking over the dishes, my son?" I started to say 9 about a man's job or woman's work, but I knew immediately that my 10 would fall on deaf ears. I didn't taste a bit of breakfast that morning. Dad seemed in a merry mood as he 11 an exceptional Yankee game on the radio last night. Suddenly, everything grew 12 . My father announced, "Let's go on to read the paper." "Aren't you doing the 13 ?" my mother asked anxiously. "Your oldest son has generously offered to fill the 14 ." "I want you to have this, Tommy. It'll 15 your clothes from getting wet." And 16 I could say a protest, he had put the thing on me. "Thanks, my son. Your mother and I 17 this." With that he 18 into the Sunday paper. I looked down at the plastic. It had seen better days. I could see my dad reaching for the dishes. The dark angel flew 19 . Soon I was singing about Mrs. Murphy’s chowder. The words came out of nowhere. And out of nowhere I knew the kind of man I 20 to be. | |||
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