我国规定一般情况下，安全电压为（）V。
A.36
B.24
C.12
D.2.5
参考答案：A
[A] eyes[B] hat[C]clothes[D]nose[E] ears[F] mouth[G] shoes
You wear them to cover your body.
油气地质勘探应向哪几个方面发展？
