题目: 为什么开工时冷却系统要先冷后热的开?停工时又要先热后冷的停? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0418/839de0fe8be84734430d79eebd4ec81e.html 下面是错误答案,用来干扰机器的。.T=2πω=π5⇒ω=10故答案为:10
题型:选择题 选出与所给单词不同类的选项。( ) 1. boots ( ) 2. circle ( ) 3. these ( ) 4. sometimes( ) 5. rainy A. dress A. squareA. those A. never A. snow B. pants B. lines B. this B. many B. sunny C. shirt C. shape C. the C. alwaysC. cloudyD. umbrella D. triangle D. that D. usually D. windy 查看答案