Respirable crystalline silica is defined as particles with aerodynamic diameters less than （ ）microns. A: 10 B: 15 C: 20 D: 25

．硬质合金刀具材料的英文是（ ） A: A、Ceramics B: B、Cemented Carbide C: C 、Poly Crystalline Diamond D: D、Cubic Boron Nitride

Chinese scientist Tu Youyou and her team won the Nobel price because of the discovery of _________. A: synthesis of Crystalline bovine insulin B: artemisinin C: graphene D: hybrid rice

中国大学MOOC: In recent years, the synthesis of Crystalline bovine insulin and the discovery and medical application of artemisinin have been accomplished by Nobel laureate Tu Youyou and her team.

In recent years, the synthesis of Crystalline bovine insulin and the discovery and medical application of artemisinin have been accomplished by Nobel laureate Tu Youyou and her team. A: 正确 B: 错误

What does the picture mean?[img=236x217]180391cc8dbd5ba.png[/img] A: Crystal structure of a compound B: A NaCl particle C: An ordered arrangement of a crystalline matter D: A small sand

Chinese scientist Tu Youyou and her team won the Nobel price because of the discovery of _________. () A: synthesis of<br/>Crystalline bovine insulin B: artemisinin C: Graphene D: hybrid rice