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Base on the classical problem of the theory of optimal stopping──the secretary problem,k-th choice problem is worked out(k managers choose k secretaries ).The optimal stopping rule is given,and we proved that the optimal value of probability is the kth item of Poisson distribution with parameter k.i.e.e￣-K/k!.

从最优停止理论的经典问题──秘书问题出发，构想了K个经理从N个姑娘中各选一秘书的问题，证明了其最优规则，得出了概率最优值是参数为K的泊松分布的第K项，即e￣k￣k／k从！

At the same time, intact shuttle-plasmid pZ189 was also introduced into the host cell which was used for detection of nontargeted mutation frequency. After replicating in cells, progeny plasmid DNA was isolated and transformed into E coli. MBM7070.In the presence of ampicillin, X-gal and IPTG, pZ189-transformed E. Coli MBM7070 forms blue colony if the plasmid contains an active SupF suppresser tRNA gene, and white or light blue colony if the SupF tRNA gene is inactive.

但是由于检测非定标性突变需同时引入穿梭质粒pZ189在细胞中复制，并回收质粒DNA，通过转化宿主菌E.coliMBM7070，在含x-gal和IPTG的氨苄指示板上培养，如果用于检测突变的靶基因SupF tRNA基因发生突变，则菌落色泽为白色或淡蓝色，而正常者为兰色。

On the boundary of the mean surface of the conductor plate,the tangential component of E is coupled into the finite element equation by means of the differential of H.

借助于磁场强度H的微分，在薄导体板的均值面的边界上，电场强度E的切向分量被耦合进有限元方程，而电场强度E的法向为零的边界条件被强加。

Pistachios also contain a high amount of gamma tocopherol, a form of vitamin E that works in concert with the more ...

开心果也含有高量的γ-维生素E ，一种形式的维生素E的作品音乐会，与更多的

Pecans are especially rich in one form of vitamin E – gamma tocopherol.

美中不足是特别丰富的一种形式的维生素E-伽玛维生素E。

An amount of 400 IU a day of vitamin E in the form on d-alpha tocopherol is enough for your Candida treatment.

左翼000400维生素E，每天的形式对D-阿尔法维生素E是够贵念珠菌治疗。

Provides a balanced spectrum of the nine forms of vitamin E, in a clinically tested tocopherol ratio that supports heart health.

提供全面平衡的九种维生素E，并且维他命E的比例在临床实验中显示能够很好地促进心脏健康。

The main ingredient in the set-theoretical part of Kobayashi-Hitchin correspondence is the followingTheorem 01. A stable holomorphic vector bundle E admits a Hermitian-Einstein metric.

其中重要的一步是如下的定理1.M是一紧复流形，设E是M上一稳定的向量丛，则E上存在有Hermitian-Einstein度量。

Suppose that G = V(G,E is a connected, simple graph with vertex set V and edge set E.

设G是一个连通简单图，V，E分别表示图G的顶点集和边集。

RI Director Kjell-珶e 珶esson, RI President Wilfrid J. Wilkinson, and Rotary Youth Exchangers show their enthusiasm for Rotary's polio eradication successes as Tuesday's plenary session came to a close.

当星期二的全体会议即将结束时，国际扶轮理事 Kjell-珶e 珶esson 、国际扶轮社长威尔弗E魏京森、与扶轮青少年交换学生们展示了他们对扶轮的根除小儿麻痹等疾病成功的热情。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。