Only by_______each other can we achieve our goals .

A．teaming up with

B．catching up with

C．putting up with

D．keeping up with

肾由几部分结构构成：①肾实质、肾窦；②肾皮质、肾髓质；③肾锥体、肾柱、肾 * * ；④肾盏、肾盂、肾动脉、肾静脉、脂肪

A．①

B．①②

C．①②③

D．①③④

E．②③④