1选A,2选B,我不确定答案,1.It is hot and dry,the flowers need__A.watering B,being watered C.to water D.be watered 2.My room is a mess.It wants__ A.to be tidying B.tidying up C.to tidy up D,tidied up

1选A,2选B,我不确定答案,1.It is hot and dry,the flowers need__A.watering B,being watered C.to water D.be watered 2.My room is a mess.It wants__ A.to be tidying B.tidying up C.to tidy up D,tidied up 第三题!不确定选A还是B I find important to take notes. A.very B.it C.that D.too 我选C.但不确定,请作答,并给理由 A:look!() this in English.A.What B.what are C.What is B:It is a() A.ruler B.jacket C.pen我觉得第一个选C,第二个三个都可以选,我不确定, 两个大小和方向都确定的力,其合力（）A.大小和方向都确定B.大小确定,方向不确定C.大小不确定,方向确定D.大小和方向都不确定我选的是D,但答案是A.我觉的题目中缺少两个力是共点力,请问这 我觉得应该选B但我不确定 It is _______ to discuss the proposal(建议) at the next meeting.A worthwhile B worthy选哪个?最好能说一下原因.不确定答案的,请不要乱回答. |a-2|+|b-5|的值(请写出全部答案)我算过了好像有四种答案,但是不确定,求详解. 第十四题 我咋觉得该选B但是不确定 物理实验数据处理,不确定度与相对不确定度(急）!试求下列间接测量值的不确定度和相对不确定度,并把答案写成标准形式（1)X=A-B,其中A=（25.3+-0.2）cm,B=（9.0+-0.2）cm;(2)R=U/I,其中U=(0.5+-0.2)V,I=(10 27题,选A还是C,我不确定 英语翻译牛B的翻译下+++++++++我不确定答案 英语题,I can learn a lot ( ) it. A.from B.of C.of 我不确定.希望有解释 一道英语选择题-时态-- I heard that Fred lost hisjob at the factory.Is it true?--Yes,it is...and it's really a shame.He________there for a long time.A.had worked B.worked C.works D.had been working 选哪个,为什么?不确定答案的朋友 以下几个单选题目我答案不确定,请帮我看看.1.It is not until you have lost your health____you know its value.A.until B.when C.what D.that 2.____ at the news that I didn’t know what to say to comfort her.A.So sad she looked B.So sad 在平面直角坐标系中,A（1,3）、B（1,-1）,则AB=____ 我做了,但是答案不确定, 不定积分∫2xdx= A.x^2+lnc还是B.x^2+c^3,这是一道选择题,有两个答案我已排除,我认为是B,可答案是A,我认为答案是错的,但还是不确定 1.△ABC中,sin²A=sin²B+sin²C,则△ABC为（ ）A 直角三角形 B 等腰直角三角形 C 等边三角形 D 等腰三角形我选A ,我不确定!我是这样想得,由正弦定理a/sinA =b/sinB =c/sinC =2R①,得sinA=a/2R,sinB=b/2R,