单词拼写 （共5小题，每小题1.5分，满分7.5分）

小题1:Many people are                 (关注) about the rise of the food price.

小题2: He caught a cold yesterday and                 (遭受) from a headache last night.

小题3: What is your                (态度)towards the questions?

小题4:His failure was a great                 (震惊)to us.`

小题5: An earthquake left the whole city in                 (废墟).

绕线转子异步电动机的电刷与集电环间的接触面不应小于全面积的（）