未分类 · 2025年11月21日

Which sound requires a placement of the tongue-tip being pressed against the upper gum ridge?（ ） A./n/ B./m/ C./?/ D./r/

Which sound requires a placement of the tongue-tip being pressed against the upper gum ridge?（ ） A./n/ B./m/ C./?/ D./r/

正确答案：A

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