青藏鐵路將經過三江源（長江、黃河、瀾滄江之源）地區。下列關于該地區地理環境特點的敘述，正確的是（）。
A、山高坡陡，地勢起伏大C
三江源地區位于青藏高原，海拔高但起伏不大；為典型高原大陸性氣候，冷熱兩季交替，日照時間長，輻射強烈，冷季冷高壓熱量低，熱季降水多，全年氣溫偏低；冰川湖泊多，但排水不暢，沼澤多；草地大規模退化，生態環境脆弱。故本題答案選C。
___ you like other items, kin dly let us know and we shall be only too pleased to make you offers direct.()
I don ’t think the charge for overhauling the equipment is excessive in _______ to its size.
It is believed that grammar analysis and translation began to be the basic procedures in foreign language teaching from _______.
The challenge is not one of expansion. _______, the rapid growth in enrollment over the last 40 years has come to an end.
Young ________ he was, he managed to make a living on his own.
