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【单选题】
以下选项中合法的字符常量是A.
"b"
B.
'\102'
C.
68
D.
D
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【单选题】What is e-books negative impact on social relationships?
A.
They create new jobs only for writers.
B.
Fewer and fewer people have access to new technology.
C.
They may threaten some traditional trades.
D.
They isolate people from one another.
【简答题】b____ n.1 a group of people 一群;一伙 2 a group of things that are fastened,held, or growing together 一束;一串
【单选题】What is not a environmental impact?
A.
Changes in the lives of people who live in destination communities associated with tourism activity
B.
Changes which result from personal contact between tourists, providers & hosts
C.
Changes in the arts, artifacts, customs, rituals, & architecture
D.
Changes which occur as a result of social exchanges
【简答题】b____ n. 群,伙;束,串
【单选题】The impact of social media on families has been researched to see what negative and positive effects are happening. ______are increasingly concerned that technology is breaking down family communicati...
A.
Physicists
B.
Psychologists
C.
Setting
D.
Peers
【单选题】道尔顿提出了原子论,阿伏伽德罗提出了分子论,下列哪位科学家综合两种学说,论证了原子 - 分子学说,解决了两种学说的争论。
A.
拉瓦锡
B.
维勒
C.
贝采里乌斯
D.
康尼查罗
【单选题】Opinions vary the impact of social networking websites on reading
A.
when it comes to
B.
what they say about
C.
what people tell about
D.
when they come to
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