w <- c(FALSE,TRUE, 7L) ww <- c(TRUE,3,"a") www <- c(TRUE, FALSE, 1) wwww <- c(1L, FALSE, 1) what are the data types of these vectors?  1: w 2: ww 3: www 4: wwww匹配题

A

"double"

B

"character"

C

"integer"

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