如图，将几块经过烘烤并冷却后的木炭（或活性炭）， 投入到盛满红棕色二氧化氮气体的集气瓶中，轻轻摇动，红棕色逐渐消失，这是因为木炭（或活性炭）结构 ，有 性，倒扣的漏斗内水面 （填“上升”、“下降”或“不变”）。
相关试题
There’s _____ wrong with my computer. I’ll have it _____ .
| A．something; repair | B．anything; to repair |
| C．something; repaired | D．anything; repaired |
Mr Liu is ____ unusual teacher. He has written _____ useful book for his students.
| A．an; an | B．an; a | C．a; a | D．a; an |
书面表达10分
根据提供的要点写一篇50字作文。
要点：你叫Linda Brown .请你介绍你的姓，名，电话号码（021—8258168），介绍家庭成员（父母和一个哥哥，叫Bob）和介绍你的房间，用in. on .under 方位介词介绍你房间的的物品和物品的位置。
补全对话
A: Good morning, Jane.
B: ______________, Sally
A: Oh, Jane, this is my sister, Kate. Kate, this is my friend Jane.
C: Nice to meet you, Jane.
B: ______________. Are those your parents?
C: ___________.
B: And ____________
A: He is my brother, Paul.
B: Oh, I see. Well, ______________.
A/C: Thanks! You, too. Bye!
| A．Yes, they are. |
| B．Good morning |
| C．have a good day |
| D．who is he? |
E. Nice to meet you, too.
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