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【多选题】
下列关于作用的代表值说法正确的是（ ）。A.
永久作用的代表值为其标准值。
B.
可变作用的代表值包括标准值、频、准永久值、组合值。
C.
偶然作用取其设计值为代表值。
D.
地震作用的代表值为其标准值。
E.
偶然作用取其标准值为代表值。
F.
地震作用的代表值为其设计值。
G.
永久作用的代表值为其标准值和组合值。
H.
可变作用的代表值只有标准值、频、准永久值。
I.
作用的设计值为作用的标准值或组合值乘以相应的作用分项系数。
J.
永久作用标准值可根据统计、计算，并结合工程经验综合分析确定。
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