自杀的保护因素有哪些？

A. 0.5、0.7m
B. 0.7m
C. 0.8一1.0m
D. 1.2m

A. 正确
B. 错误

A. without losing the rhythm of respiration
B. only with the help of two other people
C. by not stopping the respiration for more than 5 minutes
D. at ten-minute interval