题目

When we think about the dreams we have, it is surprising to see how many people failed even if they could have succeeded. So today I’m going to tell you five ways to kill your dreams. l         Believe in overnight success. Everyone knows the story of a tech guy who built a mobile app and sold it for a lot of money. __8_ If you investigate further, you will find that he is well educated and has been working on the project for 20 years. Therefore, your overnight success is always a result of what you’ve done in your life. l         __9__   Constantly, people aro一般来说，动物细胞培养需要满足以下条件（   ）   ①无毒的环境                        ②无菌的环境                  ③合成培养基需加血浆 ④温度与动物体温相近              ⑤需要O2，不需要CO2      ⑥CO2用来调节培养液的pH A．①②③④⑤⑥       B．①②③④           C．①③④⑤⑥              D．①②③④⑥