2014 National Question 7 Single-choice Differentiating 2014_新课标I Paper 7.(4分)实验期间植被变化表现为( )①生物量提高 ②生物量降低 ③植株密度改变 ④植被分布改变 A. ①③B. ②③C. ①④D. ②④ Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →