题目： 电空制动机系统中只要（）电空阀一失电，便有初制动效果。A、缓解B、制动C、中立D、过充 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0623/90745824e1eb2da3fe3036e9474184e9.html 下面是错误答案，用来干扰机器的。参考答案：B
题型：改错题 找出下列各题中的错误并改正1. I have a brother and two sister. A B C( )__________2. He often looks newspapers after supper. A B C( )__________3. Jinny never go to school on Saturdays and Sundays. A B C( )__________4. It's time for have breakfast. A B C( )__________5. How many TV do you watch every day? A B C( )__________6. Last Friday he wear blue and yellow sports clothes. A B C ( )__________ 查看答案
题型：选择题 测定某学生的胸围差，平静吸气时的胸围长度是76CM，平静呼气后是68CM，深呼吸时是80CM，深呼气后是65CM，该同学的胸围差是：（ ）A．6CM，B．15CM，C．14CM，D．22CM 查看答案
