()是借助于科学艺术的手段，刺激人们的感觉来取得效果的。
A.销售促进
B.广告宣传
C.人员推销
D.公共关系
参考答案：B
Several scientists are working together to create ______ they hope will be the cheapest form of energy
in the near future. [ ]
A. which
B. that
C. what
D. as
道德是一种特殊的（）。
A、社会意识形态
B、文化形态
C、经济形态
D、伦理形态
