8. Sulfur has occasionally been found in the earth in an almost pure state.

admin2010-01-14  46

问题 8. Sulfur has occasionally been found in the earth in an almost pure state.

选项 A、regularly
B、accidentally
C、sometimes
D、successfully

答案C

解析
转载请注明原文地址:https://kaotiyun.com/show/HSmd777K
0

最新回复(0)