问题
选择题
His home is on busy street, There is oldhotel next to it.[ ]
A. a; a
B. a; an
C. an; a
D. the; the
答案
答案：B
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His home is on busy street, There is oldhotel next to it.[ ]
A. a; a
B. a; an
C. an; a
D. the; the
答案：B
cosωt
