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• 21. 如圖所示,有一長度為a、寛度為b、電阻為R的矩形線圈,維持等速率v横向穿越一寬度為2a的均勻磁場，磁場值為B,方向垂直穿入紙面。當線圈有一半面積進入磁場時,其應電流及方向為何?【題組】22.
• 附圖是光合作用的實驗裝置,在實驗之前先將植物盆栽放在暗室中3天,再拿一長條鋁箔包住其中一片葉片，放置在陽光下2~3天後、取下此葉片以沸水加熱數分鐘,再用酒精隔水加熱。然後在葉片上滴上碘液,觀察葉片的顏
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• 【題組】38.在此活動中，酒精隔水加熱的目的是什麼?(A)避免溫度過高傷害葉綠素(B)破壞葉片的表皮層,讓碘液可以滲入葉片中(C)避免酒精燃燒 (D)如此才使氣孔打開,讓碘液可以滲入葉片中。
• 【題組】39.在此活動中，將處理過的葉片滴上碘液一段時間後,葉片的顏色會如何變化?(A) (B) (C) (D)
• 23. 在電流天平實驗中,若螺線管所載電流為I1,U型電路上的電流為I2,天平前端所掛的小重物重量為mg,此時天平恰能維持水平平衡狀態。則下列何種改變後,天平仍可維持平衡狀態?(A)I1反向(B)I2
• 17. I need an eraser. Can you get it for me? It's in thesecond _____ of my desk.(A) floor (B)ba
• 18. You shouldn't do your make-up(化妝) in _____ places.It's not good manners.(A) following
• 19. In the future, cars can drive by themselves. You caneven take a nap(小睡一下) in the car. Can you __
• 20. Drunk-driving(酒驾) is wrong. It may _____ seriouscar accidents. Don't do that, plcase.(A) be
• 21. There's a notice saying" No Smoking.' You'd better _____ your cigarette ____
• 22. A: Ted was _____ at the door because he's too fat.B: Shut up!(不會吧)(A) stuck (B)slim (C)seri
• 23. A: I was too busy to finish my homework.Can I copy yours?B: No way.A:_______ (A) You may say tha
• 24. A: I heard you cry out _____ What happened?B: I was attacked by a bee.(A) one by one(B) from mil
• 25. Of my friends, Emily is _____ She's a dear friend.(A) the nicest (B) so nice(C) nice enough
• 26. I wonder _____. (A) how many sheep are there on the farm(B) why no one wants to go into the fore
• 27. The boy _____ parents are lawyers oftentakes a taxi to school.(A) whose (B) who (C) what(D)which
• 28. We're surprised _____ the packages weredelivered by a drone.(A) whether (B) what(C) who (D)
• 29. While Elsa _____ the street, a motorcyclist wentthrought the red light and hit her.(A) crossed(B
• 30. All parents try their best ot _____ their kids _____ getting hurt. That's why your mom keep
• 31. The restaurant sells the best steak in Taipei. You can'tfind _____ steak in the city.(A) de
• 32. Don't be as _____ as a snail(蝸牛). Would you pleasehurry up?(A) slow (B)slower (C)the slowes
• 33. A: I was praying in the temple when the earthquake hit.B: Did you run out for your life?A: No, I
• 34. A: How about the job interview you had this morning?B:_____ (A) Don't bite the hands that f
• 35. A: Allen is trying to ask me out. I don't know how to _____ him _____. B: Easy. Tell him yo