单选题Which built-in returns a BOOLEAN value that indicated whether an objects internal ID is available?（）AGET_ID BID_NULL CID_FIND DFIND_ID
单选题
Which built-in returns a BOOLEAN value that indicated whether an objects internal ID is available?（）
A
GET_ID
B
ID_NULL
C
ID_FIND
D
FIND_ID
参考解析
解析：
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