单词拼写（10）

56.We express our feelings by _________(手段) of words.

57.He has fifty head of ________（牛）on his farm.

58.The chemicals that are harmful to the environment are __________ （禁止）here.

59.It was a pity that my teacher had to _________（退休）early because of her poor health.

60.She lacks __________（实际的） experience.

61.If I’m not ___________（错误的）,you have got an Ain the exam.

62.In the word “know”, the letter “k” is not ___________（发音）

63.I can’t __________（假设）anything in this case.

64.After another glass of wine，I began to feel __________（眩晕）

65.The other day the crowd __________（鼓掌） his wonderful performance for five minutes

喷吹管道堵塞应如何处理？