皮皮学，免费搜题
登录
搜题
【简答题】
如图4-7所示，刚性储气筒内有10kg压缩空气，其压力为800kPa，温度为500K。周围环境为298K，0.1MPa。筒内空气在定容下冷却到环境温度，试求：
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
【简答题】Engineers had a better choice of material, ______________ (当新发明被投入使用以后).
【单选题】If a better material______, the strength of the part would have been increased.
A.
had been used
B.
had been using
C.
being used
D.
using
【单选题】A ) It looks unusual. B) It transforms. C) It uses better material. D) It is a new product.
A.
It looks unusual.
B.
It transforms.
C.
It uses better material.
D.
It is a new product.
【简答题】Developing school skills Books to help you to become better teachers or better learners These materials can help both teachers and students of different levels and grades. Reading and Langua...
【单选题】If a better material______, the cost of the product would have been decreased.
A.
had been used
B.
had been using
C.
being used
D.
using
相关题目：