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【多选题】
流化床脱硫的主要影响因素有哪些？A.
钙硫比
B.
煅烧温度
C.
脱硫剂种类
D.
脱硫剂的孔隙结构
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反馈参考答案：
举一反三
【简答题】下列对于经济周期的描述，正确的是（ ）。
【单选题】how she was helping to save the environment, she said that she always takes public transportation.
A.
To be asked
B.
Asking
C.
Being asked
D.
Asked
【单选题】She always finishes her homework on time. She _____ leaves it tomorrow. [ ]
A.
always
B.
never
C.
usually
D.
sometimes
【单选题】Nobody in the neighborhood likes her, for she always behaves as if she _____ a queen.
A.
was
B.
were
C.
is
D.
had been
【简答题】下列对于经济周期的描述，正确的是（ ）。
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