- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
組成石油的元素H含量為（）。
A.5%~8%
B.8%~11%
C.11%~14%
D.14%~17%
A.5%~8%
B.8%~11%
C.11%~14%
D.14%~17%
