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Not every subgroup of a D-group is also a D-group. If a subgroup is a D-group we call the subgroup "sub- D -group." The "commutator ideal" of G is the smallest sub-D-group containing its commutator subgroup. We found that the commutator ideal can be viewed as a finitely generated module over a ring when G is a finitely generated metabelian D-group.

并非每个子群都是一个可除群，若一个子群是可除群，我们称之为子可除群(sub-D-group)，而G 的交换子理想则是在G中包含其导出群的最小子可除群，我们发现当G是一个有限生成亚交换可除群时，其交换子理想是一个有限生成模。

The results showed that: the concentrations of PAHs were in the range of 84.5ng/g to 167.6ng/g, and the average value was 138.62ng/g in surface sediments.

结果表明，表层沉积物中PAHs的浓度范围为85.4~167.7ng/g，平均值为138.62ng/g，总多环芳烃的最大值是椒江码头。

6 F/g when the super-high specific surface area activated carbon has a specific surface area of

结果表明，超高比表面积活性炭(SBET≥2500m2/g)比表面积为2827m2/g时，电容器比电容值高达101.6F/g，是比表面积为1384m2/g的普通活性炭电容器比电容的2.4倍。

Results:①The doses of 0.8 g·kg-1, 1.2 g·kg-1, 1.6g·kg-1 and 2.0g·kg-1 of AMJ could delay the time of fatigue in nerve centre, neuromuscular junction and muscle of mice, but in hoptoad, only the doses of 0.8 g·kg-1 and 1.2g·kg-1 have the same effect,the dose of 1.6g·kg-1 and larger doses could accelerate the fatigue.

结果：① 0.8g·kg-1、1.2g·kg-1、1.6g·kg-1和2.0g·kg-1剂量的黄芪注射液均能延缓小鼠中枢、神经-肌接头和肌的疲劳，蟾蜍仅有0.8 g·kg-1和1.2 g·kg-1有此作用，1.6g·kg-1及以上剂量的黄芪注射液对蟾蜍有加速上述部位疲劳的作用。

For different polynomials g, if the characteristic polynomial of a n matrix A is irreducible, then we get some theorems to determine matrix equations g =A solvable; if it is reducible, then, to see n-dimension space vectors M over a field F as F-module, we use module theory to determine these equations solvable such that it is simpler and clearer to investigate these questions.

对于不同多项式g，当n阶矩阵A的特征多项式为不可约的，我们给出了矩阵方程g=A有解的判定定理；当A的特征多项式为可约的，把域F上的n维线性空间M作为由A导出的F -模，我们利用模论知识来决定矩阵方程g=A有解性，从而使这一问题变了简单，研究思路更加清晰。

The maximum nitrogen content in leaf and leafstalk of all three treatments appeared in late September; N values in leaf were 23.1、26.5 and 26.2 mg·g-1, and in leafstalk were 14.4、12.4 and 13.2 mg·g-1 respectively, but the contents of nitrogen in the stem of P.

其中，T1、T2和T3的叶片和叶鞘中氮含量的峰值出现在9月底，叶片氮含量的峰值分别为23.1、26.5和26.2mg·g-1，叶鞘氮含量的峰值分别为14.4、12.4和13.2mg·g-1；而茎氮含量的峰值出现在10月底，其峰值为9.5、9.1和9.0 mg·g-1。

In the same way, a Four-coloring of a maximal planar graph of 25 order G(subscript M25), is obtained with "simplified method of reduction of order".

利用"简化降阶法"对一个一定拓扑结构的12阶最大平面图G(下标 M12)进行着色，得到G(下标 M12)的四色着色方案；以同样的方法对一个一定拓扑结构的25阶最大平面图G(下标 M25)进行着色，得到了G(下标 M25)的四色着色方案。

Like the above result, any two vertices which are of distance 2 is discussed, then we obtain the following result in this thesis: let G be a graph of order n ≥ 3 such that d + d ≥ [(4n)/3] - 1 where d = 2 in G, then every vertex of G is contained in a 3-cycle.

类似上面结论，我们也只考虑图中距离为2的点对，得到下面结论：若对G中的任意距离为2的点u和v有d+d≥[4n/3]-1，那么G中的每个点都含在一个3圈中。

Let α to be independence number of graph G, in 1984 Fan showed: Let G be a 2-connected graph of order n, for every pair vertices x,y of d=2, if max{d,d}≥n/2, then G is Hamiltonian.

1984年，Fan给出了著名的Fan定理：若2连通n阶图G的距离是2的任意两点x、y均有max{d，d}≥n/2，则G是哈密尔顿图。

Let G be a connected and simple graph with p order, the complement graph G is the union of a complete bipartite graph K n,m and an empty graph K.

设G为p 阶连通简单图，其补图G为完全偶图Kn，m 及空图K的并，笔者利用完全偶图的谱的特性，获得了图G的特征根分

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。