单词拼写（共5小题；每小题1分，满分5分）

小题1:When did you get these old c      (硬币)

小题2:As we know,China,Japanese are both A           （亚洲）countries

小题3:On my way home I d      (掉)my book yesterday.

小题4:Be c      (小心的)when you walk across the street.

小题5:Everyone is here except Cheng Gang. What is wrong with him?

P            (也许)he has got a bad cold

滚弯时，在常温下多次滚压，会使材料的机械性能恶化。