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听力原文: When my first wartime Christmas came, I was in basic training in New Jersey. At that time I was not sure if I would make it home for the holidays. Only on the afternoon of December 23 did I see the list of men who would have three-day holiday. I was one of the lucky soldiers. It was Christmas Eve when I arrived home, and a little snow had fallen. Mother opened the front door for me. I could see beyond her into the corner of the living room. There the tree has always stood. There were lights of all colors, shining against the green of the tree. I felt so warm and happy! When my first wartime Christmas came, I was in basic training in New Jersey. At that time I was not【11】if I would go home for the holidays. Only【12】of December 23 did I see the list of men who would have three-day holiday. I was one of the【13】soldiers. It was Christmas Eve when I arrived home, and【14】snow had fallen. Mother opened the front door for me. I could see beyond her into the comer of the【15】room. There the tree had always stood. There were lights of all colors, shining against the green of the tree. I felt so warm and happy!
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【判断题】生动是根据不同游客和式空条件进行导游讲解,生动性是衡量导游讲解成功与否的标准之一。
A.
正确
B.
错误
【单选题】使用4-氨基安替比林作为显色剂测定饮用水中挥发性酚的含量,下列哪项不属于显色反应的条件
A.
显色剂用量
B.
反应溶液的酸度
C.
检测波长
D.
显色反应温度和时间
【单选题】下列电容器中属于有极性电容器的是( )。
A.
云母电容器
B.
钽电解电容器
C.
聚苯乙烯电容器
D.
陶瓷电容器
【单选题】( )不属于显色条件。
A.
显色剂浓度
B.
参比液的选择
C.
显色酸度
D.
显色时间
【单选题】在比色法中,下列条件不属于显色反应的条件是( )
A.
显色时间
B.
入射光波长
C.
显色的温度
D.
显色剂的用量
【单选题】.在分光光度法测定中,有关显色条件的不正确说法是()
A.
很多显色反应需要一定时间才能完成,所以须在显色剂加入后延长一段时间后进行测定
B.
当溶液酸度不同时,同一种金属离子与显色剂可能形成不同配位数的络合物
C.
显色剂浓度越大,显色反应就越完全,但太大的浓度不利于比色测定
D.
显色反应和温度没有关系,所以,绘制标准曲线和进行样品比色时温度有差别也不会产生影响
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A.
正确
B.
错误
【单选题】下列不属于显色反应条件的是: ( )
A.
显色时间
B.
入射光波长
C.
显色的温度
D.
干扰离子的排除
【单选题】针对前者提出的设想、方案逐一进行质疑,发现现实可行性的方法,是一种集体开发创造性思维的方法,是()。
A.
直接头脑风暴
B.
质疑性头脑风暴
C.
智力激励法
D.
精神错乱
【单选题】( )不属于显色条件。
A.
显色剂浓度
B.
显色时间
C.
显色酸度
D.
参比液的选择
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