George de Mestral found the idea for Velcro when he saw buttons sticking to fabric., FALSE, The author experimented with various materials for over a decade before finding the right one., TRUE, Velcro was initially popular and widely accepted when it was first introduced., FALSE, NASA used Velcro in the 1960s for its space suits and equipment., TRUE, Velcro can only be used a limited number of times before it loses its effectiveness., FALSE

さんの投稿です

リーダーボード

表示スタイル

オプション

テンプレートを切り替える

自動保存: を復元しますか?