With his money _____, he couldn’t go home.
A.leaving
B.missed
C.running out
D.run out
答案:C
医用核素活度计探测射线的依据是()
A.电离作用
B.荧光现象
C.康普顿散射
D.光电效应
E.以上均不是
西红柿种子 ( )