催化裂化因金属污染引起催化剂中毒可通过再生而恢复。（）
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新鲜催化剂的活性高，平衡剂的活性就高。（）
A. 对
B. 错
v. to continue to do sth. despite difficulties or opposition, in a way that can seem unreasonable
A. passive
B. margin
C. overlook
D. persist
n. the time at which something is supposed to begin;
A. outlet
B. meadow
C. mystery
D. outset
n. the act of allowing sb. to do sth., especially when this is done by sb. in a position of authority
A. physician
B. permission
C. navigation
D. necessity
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