Group work: What’s your opinion on studying abroad? If you have a chance to decide whether to study in a famous university in China such as Qinghua and Beijing University or in an ordinary university in Britain or the USA, what would you choose? Why? Give your reasons

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Below is an electron micrograph of a single gene being transcribed. The DNA strand runs horizontally with RNa transcripts extending vertically outward Image removed due to copyright reasons a)Draw an arrow indicating the direction that the RNA polymerases are

基变换与坐标变换 设向量空间的基①a1,,a,;基②1,…, 基变换:B,可由a1,…,a,唯一的线性表示,所以有 1=c1a1+c2a2+…+

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Chapter Organization Introduction A Model of a Two-Factor Economy Effects of International Trade Between Two-Factor Economies Empirical Evidence on the Heckscher-- Model Summary Appendix: Factor Prices, Goods Prices, and Input Choices