Chapter 1 Chemistry is a Science of Change water molecule is consisted of one oxygen(氧) atom and two hydrogen(氢) atoms A cup of water contains about 1024 water molecules

Golden rice: two European scientists created a new strain of rice enriched in B-carotene, which the body uses to make vitamin A. This is a kind of transgenic plant(转基因植物)

I. Choose the Correct Answer 1. Which statement is most correct? (C) (A)Uniform circular motion causes a constant force toward the center. (B)Uniform circular motion is caused by a constant force toward the center

1. Our company decided to the contract because a number of the conditions in it had not been B) refuse C)assume 2. She is a musician than her brother A)much of B)much as C) more of

wrong shape for a heavenly messenger. Anyway, it's time to stop wondering whether she came from heaven or a nearby town. What matters is this: whoever she was, Aunt Esther Gubbins was right.\

A reference frame consists(1)a coordinate system and(2)a set of synchronized clocks distributed throughout the coordinate grid and rest with respect to it

Chapter 1 Introduction 1.1 Preliminary Remarks When you think about it, almost everything on this planet either is a fluid or moves within or near a fluid. -Frank M. White What is a fluid?

Test 1 Directions: Choose from A), B, C and D) the best answer to complete each of the following sentences 1. No one takes him any more, he's become a figure of fun A)earnestly B)seriously

1. You still have a lot _if you'll forgive my A)to learn/saying B) learning/saying C) learningto say D) to learn/to say 2. There is no point to persuade him to do anything A)to try B)in trying C)of trying

❖ Wikipedia and Social Knowledge Dynamics ❖ Previous Work on Wikipedia – Degree distribution – Reciprocity and feedback loops – Motifs ❖ Modeling Wikipedia’s Growth – A model about reference – A model about degree distribution ❖ AOC-based Models ❖ Conclusion