R22制冷系统的高压侧的气密性试验压力为（）Mpa。

A.0.13~0.40
B.2.7~4.0
C.6.5~7.4
D.7.5~9.0

A.0.13~0.40
B.2.7~4.0
C.6.5~7.4
D.7.5~9.0

A.0.1%~0.3%
B.0.3%~0.5%
C.0.5%~0.8%
D.0.5%~1%