单项选择题

What kind of machine can generate negative ions indoors

A.Ionisers.
B.Air-conditioners.
C.Exhaust-fans.
D.Vacuum pumps.
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热门 试题

单项选择题
The author's attitude towards women having a career is _________.
A.critical
B.positive
C.neutral
D.realistic
单项选择题
The most appropriate title for the passage would be_________.
A.The Well-being of Career Women
B.Sources of Mastery and Pleasure
C.Two Aspects of Women's Well-being
D.Multiple Roles of Women in Society
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