the railway ___(connect) Qinghai to Tibet is yery difficult

the railway ___(connect) Qinghai to Tibet is yery difficult --The railyway()Qinghai to Tibet is the longest railway.A.co the Qinghai-Tibet Pleteau is -----------of china 填下 the qinghai-tibet plateau is ------------of china. 英语翻译Qinghai-Tibet railway has openedThe world's highest Qing 英语方位词Shenyang is ()Beijing and HarbinThe Qinghai-Tibet Plate The ___ (difficult) is to stop students from talking. the problem is difficult ___ . Is ___Qinghai-Tibet Railway plays an important role in China Qinghai is in the w___ of China. the man is difficult to ( ) This man who is standing by the gate is difficult to ___.