胚芽发育成植物的茎和()两个器管。
参考答案:根
Do you know when and where the first republic ? [ ]
A.turned into reality
B.existed
C.came into action
D.came into being
肾盂癌的典型症状是
A.腰部钝痛B.无痛性全程肉眼血尿C.发热D.尿急、尿频E.无明显症状