“`python def count_words(sentence): words = sentence.split() return len(words) sentence = input(“请输入一个英语句子:”) word_count = count_words(sentence) print(“该句子中的单词数为:”, word_count) “` 代码解析 首先,我们定义了一个名为`count_words`的函数,它接受一个参数`sentence`,即...