不允许不经任何过滤而直接从油桶中取油加入设备中。
参考答案：对
In the dark street, there wasn't a single person _____ she could ask for help. [ ]
A. that
B. from whom
C. whom
D. to whom
一吨液化天然气大约可以气化成多少标准立方的天然气（）
A.约1380标准立方
B.约1480标准立方
C.约1580标准立方
D.约1680标准立方
