七大洲中平均海拔最高的大洲是 洲。世界陆地最高点和最低点的相对高度达 米。
南极 9259
退货药品库(区)（）
A．红色色标
B．黄色色标
C．绿色色标
D．蓝色色标
E．橙色色标
—What would some students like to do after finishing their education?
—They would like to start to work ______ they needn't depend on their parents completely. [ ]
A. as soon as
B. so that
C. before
D. while
