阳山水蜜桃

A. SET
B. SSL
C. 公钥
D. 私钥

A. 年终盘点
B. 定期盘点
C. 临时盘点
D. 季度盘点

A. control the fluid flow through it
B. prevent the pressure before it over the specified valve
C. make the pressure after it steady
D. control the direction of oil flow