______much is known about what occurs during sleep, the precise function of slee

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问题 ______much is known about what occurs during sleep, the precise function of sleep and its different stages remains largely in the realm of assumption.

选项 A、Because
B、Since
C、As
D、While

答案 D

解析状语从句。根据句义可知，空处所缺为让步状语从句的连接词，故选while(尽管)；much as也可引导让步状语从句，但as much不可以。

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______much is known about what occurs during sleep, the precise function of slee

______muchisknownaboutwhatoccursduringsleep,theprecisefunctionofslee

Whichofthefollowingunderlinedpartsperformsthefunctionofindirectobject

Whichofthefollowingunderlinedpartsperformsthefunctionofattribute?A、She

Whichofthefollowingunderlinedpartsperformsthefunctionofobject?A、Howma

WhowillgiveakeynotespeechduringtheMDGsummit?[br][originaltext]Wo

Whatisthemostimportantfunctionoftrees?[br][originaltext]Treesare

Inthisexperiment,theyarewakenedseveraltimesduringthenight,andaskedt

It______tomethatIcanturntoMr.Linforhelp.A、happensB、occursC、reminds

Thereishardlyany______hotelroomavailableduringthesummerholidays.A、vac

WhatisIsraelprobablytodoifPalestiniansattackitssoldiersduringthepul

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[originaltext]Dreamsarenotoriouslydifficulttorecall.Infact,ifadre

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设矩阵，已知矩阵A相似于B，则秩(A-2E)与秩(A-E)之和等于A.2 B.

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