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1.
听力部分Ⅰ 从A、B、C中选出你所听到的单词并将代表答案的字母填入前面的括号中(5分)()1 AnightBlightClate()2 AleaveBnewClove()3 AwashBwhichCwatch()4 AmiddleBlittleCtable()5 AsupperBsoldierCtableⅡ 根据所听对话及问题 ,选择正确答案(5分)()1 AShestudiesinChina.BSheteachesinChina.CSheisateacher.()2 AShecomesfromCana…  相似文献   

2.
安诺兰的试管繁殖研究   总被引:1,自引:0,他引:1  
利用我国云南、海南名优野生兰花品种安诺兰(AnotahainanensisSchitr)的种子作外植体,采用试管无菌发芽的方法,成功地培养出试管苗.合适的种子萌发培养基为Hyponex3g/L+水解乳蛋白1g/L+活性碳02%.较好的生根培养基为Hyponex3g/L+NAA05mg/L+活性碳02%.MS基本培养基不适合安诺兰的试管培养  相似文献   

3.
Ⅰ 单词辨音 ,从下列每组单词中找出划线部分与其他几个不同的那一个(10分)()1 A.burtB.termC.firstD.walk()2 A.mealB.policeC.hitD.free()3 A.glassB.passC.classD.hat()4 A.careB.heardC.chairD.pear()5 A.touchB.young C.houseD.country()6 A.passedB.mendedC.wantedD.lasted()7 A.foodB.lookC.goodD.book(…  相似文献   

4.
1.语音(5分)从A、B、C、D中找出读音不同于其他三个的选项:()1.A.usually B.much C.use D.duty()2.A.than B.nothing C.fifth D.throw()3.A.singing B.long C.bring D.English()4.A.road B.coat C.about D.boat()5.A.pear B.dear C.where D.wear()6.A.machine B.fish C.usually D.sure()7.A.score B.spor…  相似文献   

5.
一、语音知识(共8小题:每题1.5分,共12分)在下列每组单词中,有一个单词的划线部分与其他单词的划线部分的读音不同。找出这个单词。1.()A.problemB.promiseC.poationD.population2.()A.suggestB.suddenlyC.supposeD.surround3.()A.EuropeanB.breatheC.beastD.beat4.()A.throughB.touchC.troubleD.tough5.()A.crowdB.downstairsC.br…  相似文献   

6.
有关式量计算的几个问题天津市第三中学(300131)童文中1某式样(NH4)2SO4和(NH4)2HPO4的混合物含氮为21.2%,则混合物中含氧约为A.42.4%B48.5%.C81%D.35.6%解:这两种化合物中氮和氧的百分含量分别相同,21....  相似文献   

7.
I.语音:找出下列每组单词中划线部分发音与众不同的选项(5分)()1,A.cake B.baby C class D.same()2.A.very B.help C.seven D.basket()3,A.worry B.over C.come D.mother()4.A.thing B.with C.river D.fine()5.A.full B.jump C.bus D.number()6. A. book B、room C. broom D.school ()7. A. please B.sweater …  相似文献   

8.
A卷 1.在所给单词中找出划线部分读音不同的词(5分) ()1.A.place B.safe C.wake D.have ()2.A.she B.these C.letter D.metre ()3. A. wide B, nice C. live D. white ()4.A.dog B,those C.shop D.forgot ()5.A.excuse B.number C.student D.Tuesday ()6.A.farm B.hard C.warm D.card ()7.A.whose B.whole C.wh…  相似文献   

9.
鸡传染性法氏囊炎病毒(InfectionsBursalDiseaseVirns,IBDV)和禽呼肠孤病毒(AvianReovi-rus,ARV)的许多生物学特性和理化特性十分相似[1-4],尤其在形态结构和理化特性上极为相似[5],本文用SDS—PAGE区别鉴定IBDV和ARV是一种简便、快速、可靠的方法。  相似文献   

10.
1按妈咪吩咐拿玩具: A.5种(15分) B.4种(12分) C.3种(9分) D.2种(6分) 以12分为合格 2认识身体部位: A.3处(12分) B.2处(8分) C.1处(4分) D.不会(0分) 以8分为合格 3妈咪将玩具盖在纸下面,宝宝想拿: A.揭开再盖上玩(7分) B.揭开取到玩具(5分) C.找不着(0分) 以5分为合格 4用食指按电视、录音机、电灯、收音机等的开关: A.5种(14分) B.4种(12分) C.3种(10分) D.2种(8分) E.1种(4分) 以10分为合格 5称呼: A.见父叫爸…  相似文献   

11.
测定了经空间飞行处理和地面存留的番茄种子(ESE、EBS)和幼苗中活性氧代谢的某些指标.结果表明,SES和EBS之间的活性氧代谢存在明显的差异.SES可溶性蛋白质含量和SOD活性高于EBS.SES及其幼苗表现出比EBS较强的代谢强度,在萌发的起始阶段尤其如此.SES幼苗中的SOD活性和SES活性高于EBS,而MDA含量和产生速率比EBS低得多.以上结果提示,SES中保卫酶系统活性的增加,对于促进种子吸胀和萌发阶段膜结构的修复,维持膜结构的完整性以致提高种子的活力可能具有重要的意义.  相似文献   

12.
RAD是一种食品添加剂.用于农业是一种绿色肥料,能增强植物的抗逆性、增加植物产量.本实验用RAD对小麦进行浸种和喷施,研究RAD对小麦农艺性状和产质量的影响.试验结果表明,RAD对小麦的发芽势、发芽率、分蘖数、小穗数、抗逆性、产量及品质等均有不同程度的促进作用.  相似文献   

13.
不同品种花生种子萌发中蛋白质的研究   总被引:1,自引:0,他引:1  
花生种子白沙新l号和白沙新4号是杂交选育而成的高产新品种。白沙新1号和白沙新4号的秋植种子活力和蛋白质总含量均高于其母本汕油27。春植花生种子活力下降较快,但其蛋白质含量仍高于秋植花生种子。胚轴中可溶性蛋白质以白沙新4号最高,白沙新1号居中,而汕油27含量最低;胚轴中结构蛋白质的含量和种类随萌发时间的增加而增加,而子叶中贮藏蛋白质的含量和种类则相反。  相似文献   

14.
冬青叶鼠刺成年植株周围实生幼苗较少,将其种子在实验室进行萌发试验,初步探究其萌发特性。结果表明,当年成熟种子在25℃度的恒温培养箱中第5天开始发芽,13天发芽结束,不同个体间发芽率差异较大,最高可达91.40%,最低26.75%;同批次种子存放0、6和12个月后,发芽率分别为91.40%、52.31%和19.78%,发芽指数为61.5、31.29和9.67;不同浓度的H202、Na2Se03、CuS04、KMn04和H。B03试剂处理种子后,对该树种子萌发无促进作用;不同样地植株的种子活力有差异。  相似文献   

15.
用麦宝种衣剂对小麦种子进行包衣处理,测定种子发芽期间及苗期的各项活力指标及几个生理指标。结果表明:麦宝种衣剂处理对小麦种子发芽率、发芽势、发芽指数、活力指数和苗长、单株鲜重及苗期形态指标的影响与对照相比有所降低;麦宝种衣剂处理对TTC根系活力、过氧化物酶的影响与对照相比有所下降,但叶绿素含量与对照相比有所提高。  相似文献   

16.
对百农矮抗58、郑麦366、郑麦7698进行11种剂量的MST种子活力剂拌种处理,分别稀释0(CK)、5、10、15、20、25、30、35、40、45、50倍,研究不同稀释倍数下MST种子活力剂对小麦种子活力及幼苗生长的影响。结果表明:稀释5~50倍的MST种子活力剂均能提高小麦种子发芽指数、活力指数;拌种后幼苗干重、根系鲜重、根系干重、苗高、根系长度显著增加;以稀释30~35倍的MST种子活力剂拌种提高种子活力效果最显著。研究结果为提高小麦种子活力播前拌种处理技术提供了理论参考和技术支撑。  相似文献   

17.
在室内条件下,初步探究了温度对蜡梅种子萌发的影响.结果表明:(1)蜡梅种子千粒重为212.094±4.168 g.种壳限制蜡梅种子吸水进程,有种壳,浸种96 h,吸水率不足8%,去除种壳,10 h内,吸水率达80.2%.(2)四个温度处理下,萌发率(%)大小为:25℃(78.33)>15℃(77.5)>30℃(55)>4℃(0),4℃下,萌发率为0,15℃种子基本能正常萌发,但萌发活力指数下降,25℃下,种子萌发率,发芽势,活力指数最高,萌发速率最快,30℃下,萌发率显著下降.(3)根TTC还原活力(mg/g/h)比较:25℃(0.5348)>15℃(0.4361)>30℃(0.3318),温度对幼苗鲜、干重、含水量无显著影响,对胚根长度影响显著.可见,种壳限制蜡梅种子吸水,进而影响其萌发.低温限制蜡梅种子萌发,在一定范围内,降温对蜡梅萌发影响不大,高温则延迟萌发,且降低蜡梅种子萌发速度和质量,蜡梅萌发适合的温度在25℃左右.  相似文献   

18.
研究了不同浓度的钠盐(Na2SO4和Na2CO3)胁迫对红麻种子萌发和幼苗生长的影响.结果表明:不同浓度盐胁迫对红麻种子的发芽指标和活力指数均有一定抑制作用,随浓度的增加抑制作用越强.浓度10~50 mmol/L的Na2SO4胁迫下,红麻种子的发芽势、发芽指数与对照没有显著差异,但活力指数显著低于对照,而当Na2SO4浓度为100 mmol/L时种子的发芽势、发芽指数与对照存在显著差异,Na2SO4浓度为200 mmol/L时种子不能萌发;Na2CO3浓度≥50 mmol/L时,红麻种子不能萌发.相同浓度下,Na2CO3比Na2SO4对红麻种子萌发的抑制作用更明显.  相似文献   

19.
The changes of kernel nutritive components and seed vigor in F1 seeds of sh 2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d after pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages. Project supported by the National Natural Science Foundation of China (No. 30370911) and Education Department of Zhejiang Province, China (No. 20070147)  相似文献   

20.
The changes of kernel nutritive components and seed vigor in F1 seeds of sh2 sweet corn during seed development stage were investigated and the relationships between them were analyzed by time series regression (TSR) analysis. The results show that total soluble sugar and reducing sugar contents gradually declined, while starch and soluble protein contents increased throughout the seed development stages. Germination percentage, energy of germination, germination index and vigor index gradually increased along with seed development and reached the highest levels at 38 d aider pollination (DAP). The TSR showed that, during 14 to 42 DAP, total soluble sugar content was independent of the vigor parameters determined in present experiment, while the reducing sugar content had a significant effect on seed vigor. TSR equations between seed reducing sugar and seed vigor were also developed. There were negative correlations between the seed reducing sugar content and the germination percentage, energy of germination, germination index and vigor index, respectively. It is suggested that the seed germination, energy of germination, germination index and vigor index could be predicted by the content of reducing sugar in sweet corn seeds during seed development stages.  相似文献   

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