单选题 The countries that are being blamed for the extra greenhouse gases in the atmosphere are the rich and developed countries. On a different ______, the developing countries feel they will suffer the most of it.
A. nod B. note
C. norm D. notion

【正确答案】 B

【答案解析】[解析] 习语搭配。
On a...note以一种……的调子，带上一种……口气：We have opened our discussion on a friendly and constructive note．我们在友好和建设性的气氛中开始讨论。on the nod无异议地，无反对地：The chairman's proposals are usually passed on the nod at the shareholders' meetings．在股东会上主席的提议通常在无人反对的情况下一致通过。