可以摺叠，关闭后成栅栏形状的轿厢门，称之为（）。
A、水平滑动门
B、铰链门
C、栅栏门
D、垂直滑动门
参考答案：C
Mr Li, there is someone in the next room _____ would like to speak with you.[ ]
A. he
B. who
C. which
D. whom
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