∵10+3x是二次根式，
∴10+3x≥0，
解得x≥-103．
故答案是：x≥-103．
As far as I know, it was the car accident that led to ______．
A．him to be killed
B．kill him
C．him having killed
D．his being killed
大象一次运7立方米木材，75次能运多少立方米木材？
