Ib puag ncig yog ib qho tseem ceeb tam sim no. Lub tshuab nqa cov thoob khib nyiab tuaj yeem zais cov thoob khib nyiab hauv av. Ua li no, nws yuav qhia txog ib puag ncig huv si thiab zoo nkauj. Thiab nws yuav tsum tau kho raws li qhov loj ntawm cov thoob khib nyiab.
Lub sijhawm tshaj tawm: Tsib Hlis-20-2020