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The Wankel rotary engine was an engineering marvel that (i)_____ automobile exhaust emissions, but because it was less fuel efficient than the standard piston-cylinder engine, it was (ii)_____ in the early 1970s when (iii)_____ pollution gave way to panic over fuel shortages.
- Blank(i)
- depended totally on
- preceded the problems with
- substantially reduced
- Blank(ii)
- necessitated
- conceived
- abandoned
- Blank(iii)
- ignorance of
- espousal of
- preoccupation with
substantially reduced , abandoned , preoccupation with 显示答案
以上解析由 考满分老师提供。
