many ways have been found_small and simple machines to process
many ways have been found_small and simple machines to process
large and complicated machine parts
a by using
b to use
c using
d used
large and complicated machine parts
a by using
b to use
c using
d used
英語人氣：590 ℃時間：2020-06-08 15:41:45
優(yōu)質(zhì)解答
首先,排除c,d選項,表被動的been found不可以直接接動詞 后應(yīng)調(diào)整語序（to process指得到處理,來處理的意思,先省略）many ways to use small and simple machineshave been found many ways by using small and sim...
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