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滑雪场组织机构要保持相对稳定性,又要随着机构内外环境的变化及时做出相应的调整,使得组织机构在动态环境中始终保持弹性和活力。( ) A. 对 B. 错

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单项选择题The research and development (R & D) function of a business: (i) Is primarily concerned with market research (ii) Can improve existing products as well as developing completely new products (iii) Has been less important for firms manufacturing computers to meet an industry standard than for those firms developing the next generation of computers (iv) Is always undertaken under contract by specialist external consultancies Which of the above statements are correct

A.(ii) and  (iii) only
B.(i) and  (ii) only
C.(ii) and  (iv) only
D.(i),  (iii) and  (iv) only

单项选择题《一种微生物制备玉米秸秆多孔活性炭材料的方法》,这个专利是发明专利。( )