氯仿沥青是（）在盐酸处理前用氯仿抽检出来的物质。
A、天然气样
B、油层
C、油样
D、岩样
参考答案：D
工前会应尽可能在临近现场开工时召开。
—Excuse me, could you tell me（）for Taiwan —The day 'after tomorrow.
A. when did you leave
B. when you are leaving
C. when are you leaving
D. when do you leave
