第11题: [单项选择]What does the woman suggest they do A. The man is thinking about taking a new job. B. The man likes a job that enables him to travel. C. The man is sure that he will gain more by taking the job. D. The man doesn’t want to stay home and take care of their chil 参考答案:A 答案解析:[听力原文] M: Mary doesn’t want me to take the job. She says our child is too young. And the job requ
第25题: [单项选择]在机械循环双管上供下回式热水采暖系统的表述中,下列哪一项是正确的 A. 系统循环动力主要是重力作用力,此外,还包括水泵作用力 B. 系统的作用半径有限,一般总压力损失不得超过10kPa C. 由于水在各层散热器中冷却形成的重力作用力不同,一般会存在竖向失调 D. 即使没有良好的调节装置,也可以放心地用于三层以上的建筑物 参考答案:C