【简答题】What is the most controversial use of CRISPR-Cas9?
【判断题】钢材经冷拉和时效后,其塑性、韧性和弹性模量都有所提高。
【简答题】What is the most effective way to reduce tobacco use according to the WHO’s report? [A] Monitoring tobacco use and prion policies. [B] Protecting people by establishing smoke-free areas. [C] Enfo...