Which of the following statements would the author of the passage be most likely to agree
A. Technological development influences society's future.
B. Technological innovations are almost always successful.
C. Technicians are more useful to society than economists.
D. The economy is independent of technological transformation.
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下列哪种食物的特殊动力作用最强
A. 脂肪
B. 蛋白质
C. 糖
D. 无机盐
The single room offered in section A would be suitable for a student ______.
A. fond of keeping pets
B. doing intensive study
C. anxious to make new friends
D. wanting self-contained accommodation
慢性萎缩性胃窦炎主要与下列哪种致病菌感染有关
A. 大肠杆菌
B. 金黄色葡萄球菌
C. 幽门螺杆菌
D. 溶血性链球菌
下列有关表面活性剂结构描述正确的是
A. 表面活性剂分子一般由极性烃链和一个以上的非极性基团组成
B. 极性基团只可能是离子基团
C. 烃链长度在6个碳原子以上
D. 极性基团可以是碳酸及其盐
E. 脂肪酸类表活性剂(R-COO-)中，R-为亲油基团
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