动物5.27 Some people think that the use of animal for experimentation is cruel; others think it is good for the development of science. Discuss the two sides and giv
1.14 Mobile phone cause social medical technical problems, what form of these problems? Is it will overweight advantages in future? 1.21 What can the arts tell us th
3.11 Nowadays, the young people is leaving school and unable to find a job. Why? The reason that you think which cause such kind of phenomenon, the individual young
1.7 Some people think that they should not pay tax to state. To what extend do you agree or disagree. Give the reason that you agree or disagree or the examples. 2.1
发贴: dumber(dumber) molecule 分子a molecularcell a cellularamino a amino acids (氨基酸)protein 蛋白质enzyme 酶(proteins that are produced by cells and act as catalysts in specif