甲图所示是研究串联电路中各点电流关系的实验电路图，请你回答相关的问题。
（1）在拆、接电路时，开关必须_________。
（2）实验时电流表A2的示数如图乙所示，A2的示数为_______A。
（3）本实验得到的结论是___________________________________________。
（1）断开
（2）0.2
（3）在串联电路中电流处处相等（或I1=I2=I3）
| 完形填空。 | |||
| When Julie was a child, she was a very big fan of animals. As a result, all she ever heard 1 was "Julie, you should be a vet. You're going to be a great vet. That's what you should do." 2 when she got to the Ohio State University, she started studying to be a vet. A scholarship allowed her to spend her 3 year studying abroad in Manchester, England. Away from the family 4 back home, she found herself one day sitting at her desk, surrounded by biology books and staring out the window, when it suddenly hit her: "I'm in total 5 . I don't want to be a vet!" 6 she thought back over all the things she'd done in her life and what had made her happy. And then it hit her-it was all of the youth leadership conferences that she had volunteered 7 , and the communications and leadership courses she had taken as elective courses back at Ohio State. "How could I have been so 8 ? Here I am in my fourth year at school and just finally realizing I'm on the 9 path. I just never took the time to 10 it until now, " she thought. Inspired by her new 11 , Julie spent the rest of her year in England taking courses in communications and media studies. When 12 to Ohio State, she was eventually able to 13 the administration to let her create her own program in "leadership studies", 14 it took her 2 years longer to finally graduate. She 15 to become a senior management consultant in leadership training and development for the Pentagon. She 16 f ounded a drug-prevention organization that 17 the message "Lead your own life with the skill and the 18 to say no." So, never live someone else's 19 . If you limit your 20 only to what seems possible or reasonable, you disconnect yourself from what you truly want. | |||
| ( )1. A. showing up ( )2. A. So ( )3. A. final ( )4. A. routines ( )5. A. confidence ( )6. A. Perhaps ( )7. A. of ( )8. A. internal ( )9. A. clear ( )10. A. acknowledge ( )11. A. discovery ( )12. A. returning ( )13. A. prepare ( )14. A. as ( )15. A. hesitated ( )16. A. still ( )17. A. leaves ( )18. A. will ( )19. A. promises ( )20. A. choices | B. growing up B. But B. usual B. warnings B. silence B. Instead B. to B. innocent B. wrong B. accomplish B. information B. referring B. convince B. if B. failed B. again B. promotes B. chance B. decisions B. reasons | C. ending up C. Or C. next C. complaints C. misery C. Then C. on C. intellectual C. short C. include C. understanding C. relating C. forbid C. once C. retired C. also C. confirms C. fact C. successes C. smiles | D. cheering up D. For D. past D. pressures D. surprise D. Often D. at D. intelligent D. wide D. criticize D. research D. responding D. force D. though D. continued D. only D. acquires D. pride D. dreams D. mistakes |