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1.
在施用氮磷肥的基础上,每亩增施2~10kgK_2O,夏玉米单交制种母本棒三叶(主要功能叶)光合速率增加0.31~0.83mg/dm2·h,光合速率与施钾量之间呈二次曲线回归关系;茎粗增加0.1~0.3cm,最大叶面积系数增加0.30~0.44,空秆率下降3.6~6.6%,穗粒数增加17.8~37.5粒,穗粒重增加13.6~21.1g,千粒重提高8.0~16.6g.单交种亩产量提高18.7~36.8%.  相似文献   

2.
一、填空题: 1.x=2,x=-1; 2.(-3,-2); 3.1; 4.x≥0且x≠2; 5.k≤4; 6.y=-x+2; 7.3+2; 8. x2-3x+2=0; 9.13; 10. 3; 11. 6; 12.9cm,12cm,15cm,12cm; 13.角平分线;14.9.6。二、选择题 1.A;2.B; 3.B;4.C; 5.A;6.C; 7.D;8.B; 9.D;10.B。三、解答下列各题: 1.x1=,x2=5;2.x1=-5,x2=2,x3=-1,x4=-2; 3.6cm。 4.设原计划每天挖x米,则.原…  相似文献   

3.
同学们,第一学期就要结束了,你不想测测自己的学习成绩吗?相信你的成绩一定不错。下面的题分两部分,一共用40分钟完成。第一部分(限制时间:4分钟)8+7=10-6=2+8=15-5=7-7=3+10=17-9=5+8=10+6=13-6=12+3=12-8=8-5=7+8=7-6=0+8=4+9=16-2=2+9=18-9=12-3=4+7=13-5=5+4=6+6=9-0=6+5=14-8=15-8=9+4=14-10=6+8=4+3=16-8=4+4=12-7=11-4=8+5=11-2=9+…  相似文献   

4.
1.相当多的独生子女不干或很少干家务。在调查所列的5项劳动种类中,只有15.5%的孩子经常购物;11.6%的孩子经常打扫卫生、整理房间等;8%的孩子经常洗碗、洗菜;6.6%的孩子经常洗衣服;3.9%的孩子经常做饭。比例都是相当低的。另有69.7%的孩子明确表示从没有做过饭或很少做饭;63.2%的孩子从没洗过或很少洗衣服;48.1%的孩子从没做过或很少做洗碗、洗菜等简单的家务活儿;38.6%的孩子从没买过或很少买东西;31%的孩子从没做过或很少做过打扫卫生、整理房间这些力所能及的事。2.独生子女平…  相似文献   

5.
我省实施“国家贫困地区义务教育。程”自去年7月签约以来,各巷目县进展顺利,形势很好,克服了资金紧张、施工期短等不利因素,取得了显著成效,改变了贫困县教育落后的面貌。现在生均校舍面积达到了小学3.4平方米,初中4.2平方米;小学、初中危房比例分别由1994年的2.5%和1.6%下降到1996年的1.05%和0·7%;课桌椅配齐率由96.1%和98.1%提高到98.8%和99.6%;仪器设备达标学校占学校总数的比例由1994年小学的15%、初中的57%分别提高到57%和63%;生均图书数小学由2.6…  相似文献   

6.
通过对豫北辉县、新乡县、延津卫辉等地棉铃虫的田间系统调查,基本摸清了一代棉铃虫在该地区的种群动态,即越冬平均密度为1.9头/m^2,越冬代蛾盛期为4月底至5月初,幼虫3龄盛期在5月中旬。通过室内饲养观察了棉铃虫的活动危害习性,即1天的活动取食高峰呈不均称双峰型等;测定了幼虫的食量,2 ̄6龄幼虫的日均食量分别为0.8粒,1.9粒,2.7粒,3.1粒,4.3粒。1头幼虫可完全破坏47.7粒小麦。在讨论  相似文献   

7.
运算要“见繁即变,见简即用,不胶一法”(宋,沈括《梦溪笔谈》),因此应既重“通法”也追求“技巧”.本文介绍根式运算的技巧.1.分母有理化与分子有理化并重.例1比较下列各组的两个数的大小:(1)13姨-2姨与42姨;(2)(7姨-6姨)与(8姨-7姨).分析(1)把分母有理化,13姨-2姨=3姨+2姨,而42姨=22姨=2姨+2姨,显然有13姨-2姨>42姨.(2)最宜使分子有理化,7姨-6姨=17姨+6姨,8姨-7姨=18姨+7姨.很明显,7姨+6姨<8姨+7姨,所以7姨-6姨>8姨-7姨.2.换…  相似文献   

8.
《大学英语》第一册期末考试样题参考答案一、Translationofwordsandphrases:(20%)1.智力2.理解(力)3.支票4.效率高的5.成年人6.(应)负责的7.靠近8.诚恳地9.控制自己的感情10.突然看到;瞥见11.enuel...  相似文献   

9.
一项完全由35岁以的网民参与、名为“中国年十大流行语”的网上评活动已经揭晓。2000多参评者在众多候选词语(可自己推荐候选词语)中选10个,以下10个词语终被排进了前十名。下面序位、流行语和提及率:1.“9·11”,68.4%2.“本·拉登”,62.33.“申奥成功”,60.74.“加入世界贸易织”,56.7%5.“WTO”,53.8%6.“翠花上酸菜50.1%7.“出线”,46.7%8.“QQ”,44.4%9.“反恐”,38.6%10.“Flash”,8.5%。,,”此次评选出的“十大青年流行语”,…  相似文献   

10.
适合黑龙江省不同地区推广的部分高产优制良种水稻11个品种松粳2:糙米率84.16%,精米率74.4%,蛋白质含量6.91%,米质食味好。适宜第一积温带种植,第二积温带寒地稀植插秧.合江19:糙米率82.7%,精米率75.8%,整精米率68.5%,透明...  相似文献   

11.
《海外英语》2007,(5):44-45
It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,  相似文献   

12.
一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/  相似文献   

13.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?  相似文献   

14.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.  相似文献   

15.
王菲 《华章》2007,(12):273-273
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.  相似文献   

16.
裴水妹 《华章》2007,(11):196
Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.  相似文献   

17.
18.
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…  相似文献   

19.
《海外英语》2007,(4):8-9
城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!  相似文献   

20.
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.  相似文献   

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