【名词&注释】
世博会(world expo)、高锰酸钾(potassium permanganate)、矿泉水(mineral water)、文化交流(cultural exchange)、志愿者(volunteers)、蒸馏水(distilled water)、稀有气体(noble gas)、剩余物(remainder)、友好使者(friendship envoy)
[单选题]41_________.
A. for
B. with
C. at
D. in
查看答案&解析
举一反三：
[单选题]下列物质属于纯净物的是（ ）
A. 从空气中分离得到的稀有气体(noble gas)
B. 经过沉淀，过滤后得到的矿泉水
C. 高锰酸钾加热完全分解后的剩余物(remainder)
D. 部分结晶的蒸馏水
[单选题]30．
A. mountains
B. cities
C. rivers
D. seas
[多选题]M: Oh, hi, What is your name again? Since this is only the 2nd day of school, I can’t remember the students’ names yet.W: _________56_______I have a hard time remembering names myself.
A. M: Uh, Karen, right?
B. W: ________57________My mom’s name is Karen.
C. M: Nancy, Okay. I think I heard you were from England.
D. W: Well, I was born there, but my parents are American. I grew up in France.
E. M: _______58_________
F. W: But then we moved here when I was nine.
G. M: ________59________
H. W: Well, he is a college professor, and he is in Scotland at the moment.
I. M: How interesting! What does he teach?
J. So, what does your father do now?
K. It is okay.
L. Nah, just joking.
M. What’s your mother’s name?
N. Oh, a world traveler!
O. F. No, it is Nancy.
[单选题]计算：(－2)100+(－2)101的是（）
A. 2100
B. －2100
[单选题]本届世博会是人类文化的盛宴。假如你是志愿者．在服务过程中应当①尊重各国文化之间的差异②虚心学习各国文化的优点、长处
A. ③做中外文化交流的友好使者(friendship envoy)④促使各国文化的发展趋于一致
B. ①②③
C. ①③④
D. ①②④
E. ②③④
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