根据用途和平面形状,道岔分为普通单开道岔和(  )等。

根据用途和平面形状,道岔分为普通单开道岔和(  )等。A.单开对称道岔 B.三开道岔 C.交叉渡线 D.交分道岔 E.立式道岔

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What do we know about Simon’s Workshop?

What do we know about Simon’s Workshop?A.It requires membership status. B.It las

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64. Researchers have found electrical lines are .

64. Researchers have found electrical lines are .A.blocking condors’ journey h

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