皮皮学，免费搜题
登录
搜题
【简答题】
There are two type cells can be seen in the alveolar walls .what type of cell indicated by the arrowheads ?
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】听力原文： The Credit Card in the U. S. Today, more and more people in the U. S. are using credit cards instead of money to buy what they need. Almost anyone who bas a steady income and a continuous work r...
【单选题】Since 1 955, life expectancy rates in the U.S. have
A.
moved up and down.
B.
been declining.
C.
been on the rise.
D.
remained steady.
【简答题】单选: 1 . Owing to his________ mind , he quickly found a way out. A . steady B . flexible C . concrete D . lonely 2 . In his first class , th...
相关题目：