单项选择题
According to the author, which of the following is NOT a reason why science-fiction stories are believable? A、Many science-fiction authors are scientists. B、They are about situations that will one day be true. C、Old science-fiction stories include technology that has become a reality. D、They portray the true potential of humanity.
单项选择题 （ ）是技术美的基本条件，核心思想是用尽可能少的材料、能源、时间和人力的消耗来创造技术美 A. 审美 B. 经济原则 C. 操作 D. 效用
多项选择题 中班儿童打击乐活动《赛马》教学过程中,能力目标有( )。 A. 身体协调能力、 B. 创造力、 C. 想象力、 D. 认知能力。
单项选择题 A、ΔS>0,ΔG B、ΔS0 C、ΔS=0,ΔG D、ΔS=0,ΔG=0
