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【多选题】
碘量法测定维生素C的含量的方法中A.
使用新沸过的冷水，是为了减少水中溶解氧对测定的含量
B.
滴定前加入稀醋酸使滴定对维生素C受空气中氧的影响减小
C.
淀粉为指示剂
D.
在无氯甲烷中滴定维生素C稳定性好
E.
供试品加入稀酸后，需立即滴定，以减少空气中氧影响
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【单选题】听力原文：M: Hi, Susan, I hear that you walk all the way to the office these days. W: Yes, I've found great pleasure in walking. That's the type of exercise I enjoy very much. Why does the woman walk all t...
A.
She takes it as a kind of exercise.
B.
She wants to save money.
C.
She loves doing anything that is new.
D.
Her office isn't very far.
【单选题】( )—I hear Susan will go to Beijing by herself.
A.
hat's true.________ her father ________ her mother will go with her.
B.
Both; and
C.
Either; or
D.
Not only; but also
E.
Neither; nor
【简答题】Dear Susan, I'm very gladly to hear you are coming to visit me the next Friday. Unfortunately, I won't be able to meet you at the airport although I have classes in the afternoon. You won't find diffi...
【单选题】听力原文：M: Hi, Susan. I hear that you walk all the way to the office these days. W: Yes. I have found great pleasure in walking. That' s the type of exercise I enjoy very much. Why does the woman walk al...
A.
She takes it as a kind of exercise.
B.
She wants to save money.
C.
She loves doing anything that is new.
D.
Her office isn't very far.
【简答题】Dear Susan, I'm very gladly to hear you are coming to visit me the next Friday. Unfortunate, I won't be able to meet you at the airport although I have classes in the afternoon. You won't find difficu...
【判断题】5(光盘) 使用的复合材质类型需要设置2个ID材质,给场景中的光盘赋上三种不同的材质,中间小圆圈使用 SEVEN-5A.GIF 贴图材质,最外围圆圈使用白色半透明材质,其他区域使用 SEVEN-5B.GIF 贴图材质。
A.
正确
B.
错误
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