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问题 单项选择题 A1/A2型题

目前国内医院应用最广的碘伏（络合碘）消毒剂的主要载体为（）

A.聚乙烯吡咯酮和壬基酚聚氧乙烯醚

B.十六烷基二甲基卞胺

C.烷基磺酸盐

D.聚烷撑二醇

E.酰基胆胺基甲酰基吡啶氯甲烷季铵盐

答案

参考答案：A

解析：上述两物质属非离子表面活性剂，与碘结合后性质稳定，应用最广。

补全对话，情景问答

完成对话。
  玲玲要去英国学习，她向她的网友玛丽了解英国的有关礼仪。
     Ling Ling: I'm going to England as an exchange student.
     Mary: Great!
     Ling Ling: But I don't know much of the customs and manners in England. ___1__.   
     Mary: Sure.
     Ling Ling: ___2__.   
     Mary: Well, they think it's important to be on time when you're invited to dinner. __3___. As it is
     usually planned to have the meal at the exact hour.
     Ling Ling: Then how long may I stay there?
     Mary: __4___, it seems that you have come only for the meal. An evening dinner invitation usually 
     implies  that ___5__. The hostess often plans some after-dinner entertainment.
   

     A. you stay for the whole evening
     B. Could you help me?
     C. It's not polite to leave shortly after the meal is over.
     D. It's impolite to arrive late.
     E. What rules do they have in England?
 
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单项选择题

旋转法吊升牛腿柱时，牛腿柱的预制位置应使（）。

A.牛腿靠近基础

B.柱脚靠近基础

C.柱中点靠近基础

D.柱顶靠近基础
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