再生铀黑
参考答案：
在还原条件下，从含铀地下水中析出的，产于含硫化物铀矿床氧化带底部的胶结带中或后生淋积铀矿床
The young man, ________ several attempts to beat the world record in high jumping, decided to
have another try. [ ]
A. to make
B. making
C. made
D. having made
瓦尔米大捷，三皇之战，七星期战争
