皮皮学，免费搜题
登录
搜题
【简答题】
与环境之间有能量交换但是没有物质交换的系统被称为( )。 系统与环境之间既无能量交换又无物质交换的系统被称为( )。 系统与环境之间既有能量交换又有物质交换的系统被称为( )。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】A．At five a.m. B．At four p.m. C．At four a.m. D．At five p.m.
【单选题】听力原文：W: Robert must be over ten now. M: Yes. When Mary left Tokyo five years ago, Robert was already nine. Q: How old is Robert now? (8)
A.
Nine.
B.
Twenty-four.
C.
Fourteen.
D.
Five.
【单选题】听力原文：W: Robert must be over ten now. M: Yes. When Mary left Tokyo five years ago, Robert was already nine. Q: How old is Robert now? (13)
A.
Nine.
B.
Twenty-four.
C.
Fourteen.
D.
Five.
【单选题】听力原文：M: You don't look a day over thirty. W: Really? In fact, I'm thirty-five. Q: How does the woman feel about the man's remark? (16)
A.
She's rather happy to hear so.
B.
She's disappointed to hear so.
C.
She's unhappy to hear so.
D.
She's surprised to hear so.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
