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当前学科：催化重整装置(中级工)
题目：
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载体按其是否具有催化活性可分为活性载体和惰性载体，下列载体中属于惰性载体的是（）。
A . A、α-Al
2
O
3
B . B、γ-Al
2
O
3
C . C、η-Al
2
O
3
D . D、分子筛
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