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参加報酬：2富。正解者への報酬：9財富 壁面の平坦度をチェックする方法は（ ）です。 A、2mの線受け板 B、2mの合わせ尺と楔形のスペーサー C、吊り糸と定規による測定 D、経緯儀または吊り糸と定規による測定
B、 2mの合わせ定規と楔形の隙間測定器
B、 2mの合わせ定規と楔形の隙間測定器
A、2m 案内板 B、2m 直尺と楔形のスペーサー
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