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9.theoreticalinformationorpracticaluse.a.Eitherthedirectionsaretoovagueforb.Thedirectionsareeithertoovagueforc.Thedirectionsaretoovagueforeitherd.Thedirectionsaretoovagueeitherfor请问大家为什么选c,什么语

题目详情
9.______theoretical information or practical use.
a.Either the directions are too vague for
b.The directions are either too vague for
c.The directions are too vague for either
d.The directions are too vague either for
请问大家为什么选c,什么语法
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答案和解析
C前面是主语啊,后面是固定的