作业帮第79题用语法角度求详解,
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第79题用语法角度求详解,
第79题用语法角度求详解,
第79题用语法角度求详解,
答案：A
翻译：在任何情况下,机器产出的工作都不会比被输入的工作会更多.
in no circumstances 是否定含义的短语,置于句首时,句子须采用部分倒装.
即原句正常句序为：
More work can be got out of a machine than is put into it in (no) circumstances.
可以继续变化为：
More work can (not) be got out of a machine than is put into it in (any) circumstances.
此题考查定语从句的关系代词.
____ is put into it为定语从句,修饰主句主语more work.
选项为关系代词,它代替先行词work,在该从句中充当主语,而从句中的it代指a machine.
根据相关语法,如果先行词被比较级修饰时,则定语从句的关系代词一般使用than.
此时的than类似于that/which/who等其他关系代词.
再如：I need more money than you give me.