有些植物如桃树、杏树在春天开花时，叶子尚未长出，开花时期植株需要的能量可能来自[]A．春天植株从土壤中吸收的无机盐B．春天植株从土壤中吸收的有机物C．花瓣利用太阳能进行的-七年级生物

更多内容推荐

• _________ homework did we have to do that we had no time to take a rest.A．So muchB．Too muchC．Too lit
• Look! Here _____. Let’s get on it.A．is coming a busB．comes a busC．a bus is comingD．a bus comes-高三英语
• 植物根毛细胞在下列哪种情况下会失水[]A．土壤溶液浓度＞细胞液浓度B．土壤溶液浓度＜细胞液浓度C．土壤溶液浓度＝细胞液浓度D．根毛细胞不会失水-七年级生物
• 盐碱地不利于种植农作物是因为盐碱地[]A．容易造成土壤缺水B．土壤温度过低C．土壤易于板结而缺氧D．土壤溶液浓度大于植物细胞液浓度-七年级生物
• 植物体需要量最多的无机盐是[]A．含氮、含磷、含钾B．含氮、含磷、含碘C．含氮、含铁、含钾D．含钙、含磷、含钾-七年级生物
• 甲试管盛有肥沃土壤的浸出液，乙试管盛有蒸馏水，各培养一棵大小相同的健壮幼苗，过些日子后观察这两棵幼苗的长势，请回答：（1）甲苗生长________，颜色________。乙苗生长___-八年级生物
• --Are you a teacher? --No, but I ________.A．used toB．was used toC．used to beD．used to do-高三英语
• Only when the government increases affordable homes for low-income groups . A．the imbalance of deman
• 植物体需要量最多的无机盐是[]A．氮磷硫B．硫钾铁C．氮磷钾D．碳磷锌-七年级生物
• This is not my story, nor ______ the whole story. My story plays out differently.A．is thereB．there i
• ______ I already know what career I want to follow.A．Young as I amB．I am as youngC．As I am youngD．As
• 菜农给青菜施农家肥主要是给青菜的生长提供[]A．无机盐B．有机物C．水D．能量-七年级生物
• What we have to admit is that never in the past thirty years __________ so greatly as today.A．has Ch
• 植物细胞吸水取决于[]A．细胞液浓度B．细胞液浓度＞细胞周围水溶液浓度C．细胞周围水溶液浓度D．细胞周围水溶液浓度＞细胞液浓度-七年级生物
• 下图是某同学设计的一组实验：在两个大小几乎相同的萝卜中各挖一个大小相等的洞，向甲、乙萝卜的洞中分别注入等量的清水和浓盐水，各用一个装有玻璃管的橡皮塞塞住洞口，记下-八年级生物
• —I want to get a license. What do you think I should do? —Only with enough practice ______ the driv
• 如果一株番茄植物比其它的矮小瘦弱，而且叶片发黄，那么可判定该棵番茄缺少[]A．钾肥B．氮肥C．磷肥D．硼-七年级生物
• Not all the students follow the rules. Which of the following statement has the same meaning？A．None
• Out of the crowded bus ______, who was dressed in a black suit, waving to a woman.A．a tall man stepp
• --Did you visited the military museum?--Yes. Not until quite recently ________ any idea what a guide
• So suddenly _____ the disease that the whole family were at a great loss.A．did he catchB．he caughtC
• 农业生产上所说的肥料的三要素是指[]A．氮、磷、铁B．氮、磷、钾C．氮、磷、镁D．氮、磷、钠-七年级生物
• Not until____ did Humphrey begin working. A．did it stop rainingB．had it stopped rainingC．it stopped
• 缺钾时的表现植株矮小，新叶淡绿，老叶黄色枯焦缺氮时的表现茎叶细弱，易倒伏，叶色黄，老叶焦枯并蜷缩缺磷时的表现植株矮小，茎叶暗绿或呈紫红色氮肥充足的时候使植物茎秆健-八年级生物
• 下列哪种情况下，细胞是吸水的[]A．把青菜放在泡菜坛中用盐水浸泡B．把萎蔫的青菜放在清水中浸泡C．把萝卜条用食盐和辣椒腌制D．把蔬菜放在铁锅中炒-七年级生物
• Not only ______ strict with us, but also ______ for us .A．was the teacher ; did he care B．was the t
• 种子在适宜的条件下可萌发成幼苗，幼苗能长成植物体。从种子到植物体的变化过程中，下列图中能正确表示有机物质量变化的是[]A．B．C．D．-八年级生物
• He’s only too ready to help others, seldom, _____ refusing them when they turn to him.A．if everB．if
• So loudly _____ that ______ hear her clearly.A．did she speak; could everyoneB．did she speak; everyo
• _______, she is quite modest.A．As she is an experienced teacherB．An experienced teacher as she isC．
• ______ about “the God Particle” that Jude decided to search for as much information as possible abou
• ____, he doesn’t study well.A．As he is cleverB．He is as cleverC．Clever as he isD．As clever he is-高三
• 下列哪一项农业措施最能体现目前现代化的生产[]A．合理灌溉B．合理施肥C．根外施肥D．无土栽培-七年级生物
• Nowhere else in such a small town, I think, ___ a book as good as this one.A．can you getB．does you g
• 给庄稼施肥时，用量越多越好。[]-七年级生物
• 需要磷肥较多的植物是[]A．甘薯和甘蔗B．番茄和白菜C．豆角和黄瓜D．芹菜和萝卜-八年级生物
• that they may eventually reduce the amount of labor needed on construction sites by 90 per-cent.A．Su
• No sooner _______ the competition _______ _______ an unexpected accident happened.A．did … begin; tha
• 下列农业措施不是利用植物顶端优势原理的是[]A．把棉花下部老叶去掉B．在一定时期去掉番茄顶芽C．不损伤杉树主干上的顶芽D．在一定时期去掉果实上部主干-八年级生物
• Only when he returned ________ that the war had ended and the army had come back.A．we tellB．we toldC
• Not until he took off his sunglasses _______ him.A．I recognizedB．I did recognizeC．did I recognizeD．
• Zhang Hua is clever and works hard at his subjects.A．So is Li MingB．So does Li MingC．It was the same
• Some green beans, ______ long enough, can be poisonous (有毒的).A．if not be cookedB．if not cookedC．if n
• _______ are the days when girls were looked down upon.A．GoingB．GoneC．To goD．Go-高二英语
• 无土栽培指的是什么？-七年级生物
• 给农作物进行深层施肥，可以促使根系向土壤深处生长，这是依据根的什么特性[]A．向水生长B．向肥生长C．向地生长D．固定植物体-八年级生物
• Not until he arrived home _____ he find that this wallet had been stolen.A．didB．wouldC．whenD．that-英语
• Not until I was standing on the edge of death ____ how much I wanted to live.A．I realizedB．did I rea
• 冬天大雪后，为及时清除积雪，减少交通事故，有时会在雪路上撒些食盐。但不能把带盐的雪水堆积到路边树下，其原因是[]A．雪水温度低，树木因耐受不了低温而冻死B．雪水中带有大-八年级生物
• The teacher always tells her students that only if __________ hard _________ achieve success.A．do th