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【简答题】
A. Main and Minor Points Complete the summary of the text by selecting the six answer choices that mention the most important points in it and put them in the right order. The other choices do not belong in the summary because they express ideas that are not included in the text or are minor points. (请根据课文内容在数字处填入相应选项的字母,需大写哦) 1. __1_-- __2__ -- __3__ -- __4__ --__5__ -- __6__ summarizes the text. 2. ___7___ and __8__are minor points. 3. ___9___ is true but it is not mentioned in the text. A. According to the author, friends cannot take away your source of unhappiness. B. The author enjoyed reading Travis McGee novels in her youth. C. A dog’s sense of smell is much stronger than a human's. D. One thing that can ease feelings of sadness and pain is a book. E. The author recalls a friend whose dog was his only source of comfort after we had suddenly broken up with his girlfriend. F. Another thing that can take away feelings of unhappiness is a dog. G. Even after he entered a relationship with a new woman and his life improved, he never forgot how much joy his dog had brought him. H. What makes dogs so special is that they give us unconditional love. I. The author had a pet boxer as a child.
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【简答题】试述固氮酶复合物的特性并说明生物固氮的原理。
【多选题】色谱分析中常用有机溶剂极性排列正确的是()
A.
石油醚 < 苯 < 二氯甲烷 < 乙酸乙酯 < 丙酮 < 甲醇 < 乙酸
B.
四氯化碳 < 甲苯 < 二氯甲烷 < 乙醚 < 乙醇 < 甲醇 < 乙酸
C.
苯 < 甲苯 < 二氯甲烷 < 乙醚 < 甲醇 < 乙醇 < 乙酸
D.
石油醚 < 苯 < 二氯甲烷 < 乙酸乙酯 < 丙酮 < 甲醇 < 水
【单选题】80 °C 时纯苯的蒸气压为 0.991 p Ө , 纯甲苯的蒸气压为 0.382 p Ө , 若有苯 – 甲苯气液平衡混合物在 80 °C 时气相中苯的摩尔分数为 y 苯 =0.30, 则液相组成 x 苯 接近于:
A.
0.85
B.
0.65
C.
0.35
D.
0.14
【单选题】中枢兴奋药过量的最主要反应是
A.
心动过速
B.
血压升高
C.
惊厥
D.
房室传导阻滞
【多选题】在进行协调功能评定时主要是评定哪些方面的运动能力?
A.
交替和交互运动
B.
协调运动
C.
精细运动
D.
固定式维持肢体
E.
维持平衡和姿态
【单选题】重症肝炎患着致死原因主要是
A.
心力衰竭
B.
DIC
C.
颅内高压
D.
肝功能衰竭
【判断题】网络的超文本功能使电子文本结构由链接结构向线性结构转化。()
A.
正确
B.
错误
【单选题】政府对种粮农民提供种粮补贴,这一财政支出属于
A.
预防性支出
B.
消耗性支出
C.
行政管理支出
D.
特殊利益支出
【单选题】中枢兴奋药过量最主要的反应是
A.
心动过速
B.
血压升高
C.
惊厥
D.
房室传导阻滞
E.
心动过缓
【简答题】80 °C时纯苯的蒸气压为0.991 P θ , 纯甲苯的蒸气压为0.382 P θ , 若有苯–甲苯气液平衡混合物在80°C时气相中苯的摩尔分数为y 苯 =0.30,则液相组成 x 苯 为
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