Tsab ntawv B 04 Saib Txhua Daim Ntawv Ua Haujlwm
Rub tawm cov ntawv ua lus Askiv 04 rau tsab ntawv B, kom cov menyuam kawm tau lawv cov tsiaj ntawv. Qhov no tsab ntawv B ua haujlwm yog cov menyuam yaus zoo tshaj plaws uas xav kawm xim, tracing, thiab cov ntawv sib txuam ntawm cov ntawv pib nrog B. Ntaus lub khawm rub tawm thiab ua rau koj cov menyuam kawm hauv txoj kev lom zem