题目

Since nobody is here, the meeting will be delayed until tomorrow. The underlined word means ___. A. put on   B. put off   C. put up    D. put away 答案：B 解析: delay 与put off意思相同:都是推迟的意思.（2013•道外区三模）如图．在△ABC中，C=90°，D、E分别在AB，AC上．将△ABC沿DE折叠，使点A落在A′处，若A′为CE的中点，连接A′B，A′D，且A′B⊥A′D，若DE=1．则DB=44．