17世纪以前人们认为植物生长需要的各种物质是来自[]A．土壤B．空气C．土壤中的水分D．雨水-七年级生物

更多内容推荐

• 植物生活中需要量最大的三种无机盐是[]A．含氮、磷、钾的无机盐B．含钙、铁、钾的无机盐C．含氮、镁、锌的无机盐D．含钙、磷、硼的无机盐-七年级生物
• 如图所示为细胞吸水、失水示意图。据图回答问题。(1)久旱逢雨的大树，枝叶会逐渐舒展硬挺，青翠欲滴。此时的植物细胞所处状态，符合图____（填字母）。(2)用糖拌西红柿时，会逐-七年级生物
• (2013·高考辽宁卷)At no time ________the rules of the game.It was unfair to punish them.A．they actually br
• The giant panda is an animal unique to China, and Wolong in Sichuan Province is one of the few place
• 请你设计一个实验，验证植物的生长需要无机盐。-七年级生物
• _________ I will visit Brazil during the 2016 Olympic Games. A．If I am possibleB．If it possibleC．If
• Be careful when you cross this busy street. ________, you may get run over by a car.A．If notB．If soC
• ________ that Marie was able to set up new branches elsewhere.A．So successful her business wasB．So s
• 种植业可以离开土壤。[]-七年级生物
• 在农业生产中，增加二氧化碳浓度，提高农作物的产量的常用方法是[]A．利用微生物分解有机物产生的二氧化碳B．给植物增施有机肥C．直接适量施放贮存在钢瓶中的二氧化碳D．以上都可-七年级生物
• (2013·高考福建卷)Not until he went through real hardship ________the love we have for our families is imp
• (2013·高考新课标全国卷Ⅱ)Only by increasing the number of doctors by 50 percent ________ properly in this hos
• 请你当一回农业技术员，利用所学的生物学知识解答农民伯伯在农业生产中遇到的问题：(1)张伯伯买了碳酸氢铵、氯化钾、过磷酸钙三种化肥，准备给三种作物施肥，你认为种花生应该-七年级生物
• you eat the correct food be able to keep fit and stay healthy.A．Unless; will youB．Only if; you will
• 植物种植在土壤中，土壤能给植物提供，还对植物起到___。在现代化的农场，人们可以不用，根据植物生活所需要，按照一定的来栽培植物，这种方法就是。这种种植方式的意义可以-七年级生物
• Her answer is not acceptable, and ______.A．neither am IB．either is mineC．neither is mineD．mine is ne
• The door opened and in_______.A．he cameB．came heC．did he comeD．he come-高一英语
• ________，he talks a lot about his favorite singers after class.A．A quiet student as he may beB．Quiet
• 农民给庄稼施肥、浇粪，主要是为植物提供[]A．氧气B．水C．无机盐D．有机物-七年级生物
• 某同学想要验证“植物的生活是否需要无机盐”，于是将两株同样大小的玉米苗分别放在盛有等量蒸馏水和土壤浸出液的试管中培养。实验结果如下图，请根据图回答问题(1)蒸馏水与土-七年级生物
• －Look，here________．－Oh，it's my secretary.But I________him to pick me up at seven o'clock.A
• 如图是某同学做的比较实验，用甲、乙两个试管（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，过一段时间后，生长情况如图所示，分析回答下列-七年级生物
• Not until he failed the exam _______he had left his books untouched .A．did he realizeB．had he realiz
• 含磷的无机盐在植物生活中所起的作用是[]A．使枝叶长得繁茂B．使果实、种子的成熟提早C．促进细胞的分裂和生长D．使植物茎杆健状-七年级生物
• Not only _____ great thoughts but also they express their thoughts in words which powerfully influen
• ----What’s Joan doing?----_________newspapers in the room.A．She readingB． She readsC．To read D． Rea
• —Will Mr. Black go to the opening ceremony this weekend?—No, he has finally decided _____.A．notB．not
• What would have happened ________，as far as up to the river bank.A．Bob had walked fartherB．if Bob sh
• ---Did you see who the driver was?----No, so quickly ______ that I didn’t make out what his face was
• 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
• He changed so much that only when I looked closely________he was exactly my long lost friend.A．I rea
• 下列植物中，需要含氮的无机盐较多的是：[]A．菠菜B．大豆C．花生D．马铃薯-七年级生物
• ________about the result of the experiment，he still wants to give it a try．A．Uncertain as he isB．As
• 不同植物及同种植物的不同生长时期，需要的无机盐是不同的。[]-八年级生物
• 根据植物生活需要的无机盐的________、________和____配制营养液来栽培植物，就是无土栽培。-七年级生物
• 农作物栽培过程中，需要施用量最多的无机盐是[]A．含铁、锌、钙的无机盐B．含锌、铝、铜的无机盐C．含氮、磷、钙的无机盐D．含氮、磷、钾的无机盐-八年级生物
• Never______ such a difficult problem. It took me almost half an hour to work it out.A．had I come ac
• Only when I put myself in their position ________ they were more miserable than me.A．I had knownB．ha
• Never before______ such a wonderful park, ______ I'd like to pay a visit again.A．had I seen; w
• We laugh at jokes，but seldom about how they work．A．we thinkB．think weC．we do thinkD．do we think-高三英
• ________ this way can we smooth the difficulty we are faced with now.A．Just inB．After inC．Just byD．O
• There are eight tips in Dr.Roger's lecture on sleep，and one of them is：________ to bed early un
• ________ that Tom got inside the room to see what was going on.A．So strangely did he feelB．So strang
• 植物生活中，需要量最大的是含___的无机盐。[]A．钾、铁、锌B．氮、硼、铁C．钾、铜、镁D．氮、磷、钾-七年级生物
• 植物需要的无机盐[]A．由叶吸收B．主要由根吸收C．茎和根共同吸收D．根茎叶都可以吸收-八年级生物
• 植物生活需要多种无机盐，其中需要量最多的是________、________和________的无机盐。-七年级生物
• 根据植物生活需要无机盐的、和配制营养液，用营养液来栽培植物，这就是无土栽培。-七年级生物
• “Never for a second,” the boy told the reporter, “________ that my father would come to my rescue.”A
• The sign says that children are admitted only if ________ by an adult.A．to be accompaniedB．accompany
• (2013·中原名校联考)Not only ________ polluted but also ________ crowded.A．is the city；are the streetsB．the