植物的导管为什么是死细胞

It takes me ___ an hour to cross the river.A.over B.in C.under D.at Fill in the blanks where( it is ) necessary.什么意思? Fill in the blanks with articles where it is necessary为什么不是定语从句 麻烦大家能帮我分析一下 it takes me an hour to go to the library by bus.这句话中的takes能不能换成spends?为什么不能呢?讲讲takes和spends的用法! 英语填空求帮助,Fill in the blanks and change the form where necessary.spread yield inspire explore cast1、The work will ______ across the departments.2、Their long search failed ______ any clues.3、She is too _____ when clients make demands 拿3000财富换100张幸运卡全抽的是气泡我跪了.还不如换个钥匙串玩玩T.T 给你们看看,200多张幸运卡刮到了些什么玩意儿 请问我爱你用蒙古语怎么说?还有幸福 用蒙古语怎么说 蒙语“我爱你”怎么说? “这件事做起来有些风险” 用文言文或古代诗词怎么表达啊 蒙语说我爱你怎么说?用汉语谐音或英语音标 蒙语的我爱你怎么说你好,再见,我爱你怎么说 我爱你用蒙语怎么说 幸运卡,刮来刮去都是一个星星! 求find it necessary和lt is necessary的解释首先为什么find it necassary里不加is呢?两个necessary的词性一样吗? 为什么在百度知道中点球总是被接到,而且买幸运卡刮了几十张都是一个星星在哭没有任何东西? 百度商城的幸运卡,刮一点看见星星的一角在关闭然后重新刮的话永远是星星?因为这样刮不会减少卡的数量 为什么我的幸运卡刮出来很多流泪的星星? 写中文Nice.to.meet.you 讲文明懂礼貌儿歌 fancy 后要加doing 看图,2句都是 doing.为什么啊 fancy doing和imagine doing的区别这两个都有想象的意思,那么区别是什么? Fancy to do 还是fancy doing,知道有doing,但to do 是甚么意思 Do you fancy doing something? fancy sb's doing sth与fancy sb diong sth要怎么区别? haha,nice to meet you 翻译I can not love you moreRT 什么意思? you are my sunshin my only sunshin麻烦帮我找一下这个歌~谢谢 英语翻译are uneasy emotions, 英语翻译If you don't use the option Use timings then sync will not be applied.As for the slide durations sometimes it's set for some not that enough time so it's fine with PP but iSpring tries to fit all animations to this time.Therefore,it cause They have been on good___with each other since they met.选项:a、relationsb、 friendshipc、 termd、 terms They have not seen each other since their g----填单词