下圖程序中Y0在X0接通后多長(zhǎng)時(shí)間接通().
A.同時(shí) B.10s C.20s D.30s
A.10s B.20s C.30s D.同時(shí)
下圖程序中定時(shí)器T1在X0接通后多長(zhǎng)時(shí)間接通()。
A.20s B.30s C.40s D.50s