皮皮学，免费搜题
登录
搜题
【简答题】
单层稳态传热其热流密度为( )(常量或者变量)
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：M: I think I could get a pay rise. W: Isn't your salary high enough? M: Well, it's good enough for one person. Since my mother moved in with me, I have troubles paying my expenses. W: I wish I co...
A.
Boss and employee.
B.
Brother and sister.
C.
Salesperson and customer.
D.
Doctor and patient.
【简答题】清代赵学敏在《本草纲目拾遗》中称“人参补气第一,三七____第一。