油罐试压充水到最高操作液位后,要保持不少于()小时。
A、8
B、24
C、48
D、72
参考答案:D
根据释义写出单词。
1. h_____ almost not
2. t_____ two times
3. I_____ international computer network
4. h_____ thing that a person does often
5. j_____ useless or unwanted things