皮皮学，免费搜题
登录
搜题
【简答题】
按主蒸汽压力的大小，发电站汽轮机可以划分为（ ）。
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】What is the author's purpose in quoting 'Of course, we can not imagine a life without any friend'?
A.
To show his sympathy for those who hasn't got any friends in life.
B.
To introduce the topic of the quality and quantity of friends.
C.
To disagree with the finding from the research.
D.
To show the author's surprise when heating the finding.
【单选题】Water and air are to human beings. We can not live without them.
A.
harbour
B.
function
C.
definite
D.
essential
【单选题】I型呼吸衰竭最主要的发生机制是
相关题目：