题目

已知下列元素的半径，根据以下数据，磷原子的半径可能是      原子NSOSi 半径r/0.751.020.741.17     A．0.80×                 B．1.10×     C．1.20×                 D．0.70× 答案：BMy grandparents many chickens on the sides of mountains.A. keep B. are keep C. are kept D. to keep