49答案
1.difference in denotation.synonyms may differ in the range and intensify of meaning,some words have a wider range of meaning than others.for example:the verb understand is used in a much more extended sense and than comprehend.whatever is comprehended is understood,but in many cases,comprehend cannot take the place of understand.
2.difference in connotation.by connotation we mean the stylistic and emotive colouring of words.some words share the same denotation but differ in stylistic appropriateness.for example:the words borrowed from Frence and Latin are generally more formal than native words.
3.difference in application.many words are synonymous in meaning but different in usage in simple terms,they form different collocations and fit into different sentence patterns.for example:allow and let are synonyms,but we allow sb.to do sth.and let sb.do sth.
50答案
out-going,sit-in and forty-story are compounds.
out-going is an adjective compound combined of adverb "out"and -ing participle"going".sit-in is a noun compound combined of verb "sit"and adverb"in".the last one forty-storey is also an adjective compound consists of a numeral"forty"and a noun"storey".
报告形式我恐怕帮不了你了 因为我也不清楚你要那种报告形式 我建议你把问题补充得更详细点 应该会有好心人来帮你的.哎……爱莫能助啊