问题
单项选择题 A1/A2型题
既是脱水剂，又可用作封片溶剂，对染料不溶的是（）。
A.还氧己环
B.正丁醇和叔丁醇
C.四氢呋喃
D.环己酮
E.松脂醇
答案
参考答案：C
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既是脱水剂，又可用作封片溶剂，对染料不溶的是（）。
A.还氧己环
B.正丁醇和叔丁醇
C.四氢呋喃
D.环己酮
E.松脂醇
参考答案：C
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| While my friends went away to their universities in great delight, I restarted my senior high school life. My spirits 1 at the prospect of starting all over again. 2 by strange classmates, I felt as though I were in a maze and felt 3 for myself. There were some complex feelings in my mind. I was frightened,nervous and lonely. To make 4 worse, I recalled my failure again and again, which put more pressure on me than I could 5 . As a result, I was always feeling 6 during class. One of my teachers noticed my depression and one day he asked me to go to his office, where he told me about his 7 towards life. He said," We might 8 from making mistakes, but it's important to model ourselves into people we 9 . All the growing 10 and the embarrassing things we 11 are parts of the process. We never stop 12 , so learn from it and keep up your spirits!If you are optimistic, things you want may 13 to you!" 14 feelings rushed through me. I 15 saw the sun shining again when I stepped out of his office. With the teacher's help, I finally 16 my depression. From then on, I no longer 17 my head but began smiling at my classmates. I put up my hand 18 in class and tried to answer teachers' questions correctly. I 19 have a thirst to go to my dream university, 20 now, I'm not afraid of failure because I can benefit from it. | ||||
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