搜题请搜索小程序“爱下问搜题”
问题
问答题 简答题
试述冷升水系统的流程？
答案
参考答案：
循环水进水管→`冷升水泵→各用户→循环水回水母管。
选择题
Not until the train pulled into the station _____ that his suitcase was gone.
A. did he find
B. had he found
C. he had found
D. he found
查看答案
单项选择题
桃子中所含碳水化合物主要为（）。
A.葡萄糖
B.果糖
C.蔗糖
D.甘露糖
E.麦芽糖
查看答案
