油漆桶失火时应怎样进行扑救灭火?
参考答案:
应快速使用灭火器进行灭火,或者使用石棉布等物品进行覆盖。
I was really surprised at the difficulty he had ______ English. [ ]
A. learning
B. learnt
C. to learn
D. learns
教育科学研究方法