多选题Given a header in an HTTP request：X-Retries：4 Which two retrieve the value of the header from a given HttpServletRequest request？（）ARequest.getHeader（X-Retries）BRequest.getIntHeader（X-Retries）CRequest.getRequestHeader（X-Retries）DRequest.getHeaders（X-Retries）.get（0）ERequest.getRequestHeaders（X-Retries）.get（0）
多选题
Given a header in an HTTP request：X-Retries：4 Which two retrieve the value of the header from a given HttpServletRequest request？（）
A
Request.getHeader（X-Retries）
B
Request.getIntHeader（X-Retries）
C
Request.getRequestHeader（X-Retries）
D
Request.getHeaders（X-Retries）.get（0）
E
Request.getRequestHeaders（X-Retries）.get（0）
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