2025年十年考研英语真题

１ 99 ５年英语试题S ｅ c ｔ io ｎ Ⅰ Us ｅ o ｆ En ｇ l ｉ shＳ leep i ｓ d ｉ v ｉ ded ｉ nto ｐ eriods o ｆ ｓ o－ca ｌｌ ed REM ｓ leep, characterized b ｙ rapid ey ｅ movement ｓ and dreami ｎ g， and long ｅ r per ｉｏｄ s of no ｎ-R Ｅ M ｓ leep． １ ｋin ｄ ｏ f sleep i ｓ at all wel ｌ-ｕ nder ｓｔ ood， but R Ｅ M sle ｅ p is 2 to ser ｖ e some res ｔorati ｖｅ f ｕ nction of the brain. Ｔ he ｐｕ rpos ｅ ｏ f non－REM slee ｐ is ev ｅ n mor ｅ 3 ． The ne ｗ expe ｒｉｍ ents, ｓｕｃ h a ｓ the ｓ e 4 f ｏ r th ｅ fi ｒｓ t tim ｅ ａｔ a rece ｎ t meet ｉ ng of the Society f ｏ r Sleep Re ｓ e ａｒ ch in M ｉ nne ａｐｏｌｉ s, su ｇ g ｅ sｔ ｆ as ｃｉ nati ｎ g expla ｎ a ｔｉｏｎ s 5 of n ｏ n-Ｒ EM ｓｌ ee ｐ.For exa ｍ ple, it ｈ as ｌ ong be ｅ n kno ｗ n th ａｔ t ｏ t ａ l sleep 6 is 1 ０ 0 ｐ ercent f ａｔａl ｔ o rats, ｙ et, 7 examina ｔ ions ｏ f the dead ｂ odies, th ｅ animals ｌｏ ok ｃ omplete ｌ y ｎ orm ａ l. A researcher ｈ as no ｗ 8 ｔｈ e myste ｒ y of why ｔ he a ｎ imals die. The ｒａ ts 9 bacterial ｉ n ｆｅｃｔ ions of t ｈ e bloo ｄ, 10 t ｈ eir i ｍ mu ｎｅ sy ｓｔ ems—the self－pr ｏ te ｃｔ ing ｍ e ｃ ha ｎ iｓ rn ag ａｉ nst di ｓ e ａｓ e—ha ｄ crashed．1. [A］ Ei ｔ herﻩ [B] Nei ｔ herﻩ[C］ Eac ｈﻩ ［D] Any2． [A］ ｉ ntendedﻩ [Ｂ] req ｕ ire ｄ［Ｃ] ass ｕ medﻩ [Ｄ] i ｎｆ erre ｄ3. [A］ subt ｌ e ﻩﻩ [B] o ｂｖ iousﻩ［C] m ｙ steri ｏ usﻩ ［D] ｄｏ ubtful4. [A］ maintain ｅ d [Ｂ] describe ｄ[Ｃ] ｓｅ ttle ｄﻩﻩ [D] a ｆ forde ｄ5. [Ａ] in the ｌ ightﻩﻩ ［B］ by v ｉｒ t ｕ eﻩﻩ[Ｃ] w ｉ th the exception［ D] ｆ...