单选题 The rigor of the winter in Russia was often described by Mogol.

【正确答案】 A

【答案解析】rigor严格，严厉，苛刻。四个选项：harshness粗糙的事物，严肃，刺耳；perturbation动摇，混乱；dismay沮丧，惊慌；pessimism悲观。