你认为下列装置不作改变就无法检查气密性的是 请选择ABCD8U,P1E,H+b*s2r4T2|.L'o*u1D,|)n7|7p8l+`9~:u8F-A;k6m1q.~9I
A.*u1D,|)n7|7p8l+`9~:u8F-A;k6m1q.~9I
B.*u1D,|)n7|7p8l+`9~:u8F-A;k6m1q.~9I
C.*u1D,|)n7|7p8l+`9~:u8F-A;k6m1q.~9I
D.*u1D,|)n7|7p8l+`9~:u8F-A;k6m1q.~9I