202.The length of a sound is the length of time during which it is held on continuously in a given word or phrase. The principal facts concerning length in English are given in the following rules: 203. Length of vowels 1.English vowels [i:], are longer than the other English vowels in similar context,i.e when surrounded by the same sounds, and pronounced with the same degree of stress Thus the vowels in bead

The length of a sound is the length of time during which it is held on continuously in a given word or phrase. The principal facts concerning length in English are given in the following rules: 203. Length of vowels 1. English vowels /i:/, /a: / /:/, /u:/, /a: /are longer than the other English vowels in similar context, i.e., when surrounded by the same sounds, and pronounced with the same degree of stress. Thus

一、基本概念 在此之前,我们所接触的函数,其表达式大多是自变量的某个算式,如 y=x+, u=e \(sin xy sin yz sin zx) 这种形式的函数称为显函数。但在不少场合常会遇到另一种形式的函数,其自变量与因变量之间的对应法则 是由一个方程式所决定的。这种形式的函数称为隐函数

Objectives When finishing learning this unit, you should be able to: Deal with some kinds of problems encountered in business. Complain and apologize by letter, fax or e--mail

一、f(x)=eP(x)型 二、f(x)=e,(x)cos ax+p(x) sin ax]型 三、小结思考题

一、名词解释(每题2分) 1、近等基因系 2、结构域互换 3、e-dna 4、基因转换(gene comversion) 5、微排列(microarrang) 6、双向电泳

Question 1-7 Read these sentences and the following book's description. ech contonce Which position does each sentence 1-7describe? For each sentence, mark one letter A, B, C, D or E on your answer sheet

1.写出下列函数在x=0的带佩亚诺余项的泰勒展开式: (1)e2x; (2)cosx2:

Stability Condition in Terms of the Pole Locations A causal lti digital filter is BIBO stable if and only if its impulse response h[n] is absolutely summable, i.e

基态原子的电子组态由主量子数n和角量子数所决定根据能量最低原理,镧系 元素的原子电子组态有两种类型,即[Xe4f6s2和[Xe]4fm-5d6x其中[e]为氙 的电子态,即1s22p323p3d4s24p4525p,n=1至14.镧、、钆的基 态原子电子组态属于[Xe-56类型;镥原子的基态电子组态属于[Xelf5d6s2 类型;其余元素即错、钕、钷、钐、铕、铽镝、铁、、铥、镱各元素均属于 [Xe46f2类型