答案：BDCBA
词汇讲解
1. comparatively 比较地,相当地,多少
All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
所有这些发展都比较缓慢，直到出现了科学，其速度才突然加快。
The Norwegians live in a comparatively cold zone.
挪威人生活在比较寒冷的地区。
2. insuperable 不能制胜的, 不能克服的
The difficulties that confront us seem insuperable.
我们面临的困难似乎是不可克服的。
Your 15th difficulty not insuperable expect your utmost endeavor advise result
15日电悉，困难并非不可克服，望尽最大努力并电告结果。
3. sterilize 使成不毛,断种,杀菌
After her fourth child she decided to be/have herself sterilized.
她生了第四个孩子後决定做绝育手术.
The doctor performs operations with sterilized surgical instruments.
医生用消过毒的外科手术器械做手术。
4. deterioration 恶化,降低,退化
Inevitable and steady deterioration of a system or society.
恶化，败坏系统或社会不可避免的无法逆转的恶化或败坏