查询词典 base 2

Using ethylenediamine, urea, methanal and formic acid as base material, 1, 3-dimethyl-2-imidazolidinone was prepared via cyclization reaction and methylation.

以乙二胺、尿素、甲醛和甲酸为原料，经过环化和甲基化反应制得目标产物1，3-二甲基－2-咪唑啉酮(1，3-DMI)。

Plant rhizomatous; leaf blades 0.2–0.8 cm wide, narrowed to midrib at base; wild plant.

植株根状茎；叶片0.2-0.8厘米宽，缩小到中脉在基部；野生植物。

The reason is many sided: 1 student and parent think " miscalculate " irrespective, as long as next time attentive dot went. The student allows to use a calculator in 2 education, the student had to the calculator depend on, often abandon when encountering seemingly complex calculation think, use a calculator directly, for instance 618, do not know to change brief into 13, achieve a result with the calculator directly however 0.33. Phase of 3 high school trains a student " put forward, analysis and the ability that solve a problem " the demand is higher and higher, of the train of thought that inscribes to solution in classroom education, thoughtway many somes more tuitional, and to operation ability, because the student has certain base, loosened with respect to some then. 4 emphasizes the training of all sorts of thinking ability overly, the training of operation ability has the suspicion that should try education it seems that, this also is one of reasons. The operation in 5 maths, no matter be numeric computation, return be algebraic type to be out of shape figure, photograph of the train of thought that inscribes with new knowledge, new solution, skill is compared and character, appear more as dry as a chip, the student does not have interest.

原因是多方面的：1学生和家长都认为"算错了"没关系，只要下次细心点就行了。2教学中答应学生使用计算器，学生对计算器有了依靠，在碰到貌似复杂的计算时往往舍弃思索，直接用计算器，比如618，不知化简成13，而是直接用计算器获得结果0.33.3高中阶段培养学生"提出、分析和解决新问题的能力"的要求越来越高，课堂教学中对解题的思路、思想方法的讲授多一些，而对于运算能力，因为学生都有一定的基础，于是就有些放松了。4过分强调各种思维能力的练习，运算能力的练习似乎有应试教育的嫌疑，这也是原因之一。5数学中的运算，不管是数值计算，还是代数式的变形演算，和新的知识、新的解题的思路、技巧相比较而言，显得比较枯燥，学生没有喜好。

On the base of these, and the ideas of mathematical curriculum reform and the course of the reform of solid geometry, combining with educational reality and students" psychology, put forward some thoughts about solid geometry of middle school in future:(1) The arrangement of curriculum content should. give consideration to both the logical sequence of knowledge and the development of students" psychology, and make them united;(2) Paying great attention to the analogy of plane geometry and solid geometry;(3) Some respects remained to be strengthened about solid geometry in senior middle school;(4) Emphasizing the importance of conversion in solid geometry;(5) Stressing on the combination of solid geometry and algebra and other subjects;(6) The design of the content of solid geometry should have certain elasticity, and make solid geometry and modern education technology well combined.

在此基础上，又植根于近年来我国数学课程改革的理念和立体几何课程改革的进展，并结合我国的教育实际与学生心理，对未来中学立体几何课程的设胃提出若干思考：(1)课程内容的编排，要兼顾知识的逻辑顺序和学尘的心理发展相统一；(2)重视平面几何和立体几何的类比；(3)高中阶段立体几何有待加强的几个方面；(4)强调变换在立体几何中的重要性；(5)注意将立体几何和代数及其他学科相结合；(6)立体几何内容的设计要有一定的弹性，并注意与现代教育技术相结合。

Leaves obovate, broadly obovate, or elliptic-oblong, apex obtuse with a mucro; bracteoles spiny, 2-winged at base; pseudostaminode long fimbriate and ciliate at apex.

倒卵形的叶，宽倒卵形，或椭圆形长圆形，先端钝的具一短尖头；小苞片多刺，2翅的在基部；假退化雄蕊长流苏状和纤毛的在先端 1 A 。

5 WAN Frame Encapsulation Formats frame format:– Flag—Indicates the beginning and end of the frame and is set to the hexadecimal (base 16) pattern 7E.– Address—A 1- or 2-byte field to address the end station in multidrop environments.– Control—Indicates whether the frame is an information, a supervisory, or an unnumbered type frame. It also contains specific function codes.

9.5 广域网帧封装格式帧格式：帧格式：–Flag 标志帧的开始和结尾，设为16进制的7F Flag—标志帧的开始和结尾设为16进制的7 16进制的 Flag 标志帧的开始和结尾，–Address 一个1或2个字节的域，用来在多点的网络 Address—一个个字节的域， Address 一个1 环境中对目标设备寻址–Control 表示帧是一种信息帧，管理帧或者是其他类 Control—表示帧是一种信息帧 Control 表示帧是一种信息帧，型的帧。

Sepals (4 or)5. Petals (4 or)5, white, rarely green, usually 2-cleft nearly to base, rarely retuse or multilobed, sometimes absent.

花瓣(4或)5，白色，很少绿色，通常2半裂近基部，很少微凹的或多裂，有时无。

The Chinese Muntjac's mitochondrial genome, consisting of 16354 base pairs which encode genes for 13 proteins, 2 rRNAs, and 22 tRNAs, is similar to those mammals in both order and orientation.The sequence of rRNA gene ,some of the protein-coding regions and tRNAs are highly homologous in mammals. Differences existing in the length and sequence of the D-loop regions account for the variations in mammals mitochondrial genomes.

与其他哺乳动物线粒体基因组全序列的比较研究发现：全长为16 354bp的小麂线粒体基因组同样编码13种蛋白质、2种rRNA和22种tRNA，除了用于调控线粒体DNA复制和转录的D-Loop区以外，小麂线粒体基因组各基因长度、位置与其他哺乳动物相似，其编码蛋白质区域和rRNA基因与其他哺乳动物具有很高的同源性。

To solve the s-process network equation under general conditions and to create the corresponding computation code, 2.The input data base, 3. The neutron source of s-process and the neutron number density, 4. Combining the s-process heavy elements network and neutron source with the astrophysical site.

研究的内容主要是以下几个方面的问题：1、一般情况下的s－过程核反应网络方程的求解及相应计算程序的建立；2、输入数据库的建立；3、s－过程中子源问题的研究，中子数密度的计算；4、将s－过程重元素核反应网络、中子源研究与发生s－过程的天体环境结合起来。

Leaf blade not ovate-cordate, base cuneate or subrounded, margin obtusely serrate or crenate-serrate; fruiting pedicel not longer than 1.2 cm

不卵状心形的叶片，基部楔形或近圆形，边缘钝锯齿或具圆齿有锯齿；果梗不长于1.2厘米 23

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。