初三英语：9BU4-3 Writing：Helping the people in need9B Unit4 Writing 红岭园岭部 邱洁星（已修改）

初三英语：9BU6-4 Writing：An email to a sick classmate9B U6 Writing课件-福田区莲花中学范玲玲

With the miraculous economic take- Twenty years are but a blink of an off brought about by the 20 years of eye in the long history of mankind, bu form and opening-up, Chinese people these two decades of reform and opening living conditions improved significantly

国内外发展现状 美国:最早提出 1972年开始在全国范围内实行水污染物排放许可证制度; 1972—1976年实施第一轮许可证制度阶段, 污染源削减量的确定,主要采用最佳专业判断(BU)方法(以 判断为依据)一收集工业行业可利用的数据和资料,结合高 质量技术分析作出判断。当时使用的比例,高达75%;

In going from the state space model i(t)=A.(t)+ Bu(t y(t)= Ca(t)+ Du(t) to the transfer function G(s)=C(sI -A)-B+D need to form the inverse of the matrix(sI- A)-a symbolic inverse- not easy at all For simple cases, we can use the following

3.2.1 Concepts of Stratigraphic subdivision and correlation 3.2.2 Methodology of Stratigraphic subdivision and correlation 3.3.1 Lithostratigraphic unit-LU 3.3.2 Biostratigraphic u.-BU 3.3.3 Chronostratigraphic u.-CU 3.3.4 Stratotype & GTS 3.3.5 Relations between stratal u. 3.4.1 vertical aggradation 3.4.2 Lateral aggradation 3.4.3 Biological sedimentation 3.4.4 海进与海退 Transgression & regression

1.定义:设1Bu6 若存在一分段连续控制向量u(t),能在[ot]内 ,将系统从任意的初to)转移至任意终态t) ,则系统完全能控。 说明: （1)任意初态x)=x 零终态)=0状态完全能控 （2)零初态x)=0 任意终态=x状态完全能达