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8. 阿黴素(doxorubicin)是目前常使用的癌症治療藥物,阿黴素有幾個對掌中心(chiral center)? (A) 5 (B) 6 (C) 7 (D) 8

15. 氫原子的可見光譜中,明亮的紅色譜線最可能是由於電子在下列哪一軌域躍遷? (A) 2s → 1s (B) 2p → 1s (C) 3p → 2s (D) 4s → 3p

16. 造成臭氧層破壞的冷媒分子,主要是含有哪一種化學鍵結? (A) O-Br (B) C-Cl (C) O-Cl (D) C-Br

19. Customer: Excuse me, I'm ready to order, but I don't see any menus here. Waiter: Oh, we've switched to a QR code system. Just scan this code with your phone to view the menu and place your order online. Customer: Oh, I didn't know that. _________.  Waiter: No worries! Let me grab you a printed menu right away. You can still order with me at the table. (A)I don't have my phone with me today. (B)I prefer using digital menus over paper ones. (C)I have the restaurant's app installed on my phone. (D)I've already charged my phone to a full battery.

20. Eric: Our flight got canceled because of the typhoon. The airline told me it was a natural disaster, so they weren't responsible for our accommodation. Mia: Oh no! That means _________. Eric: Yeah, we should look online soon before all the nearby hotels are booked.  Mia: Good idea. Let's find somewhere to stay until the weather gets better. (A)someone else will handle our accommodation. (B)we'll need to organize a place to stay on our own. (C)the airline will book a hotel for us before we arrive. (D)we can forget about the weather until the flight resumes.

21. Alex: After learning about the political systems in Germany, Canada, and Japan, I really admire democracy. _________. Jamie: That's true. In democratic countries, citizens can vote for their leaders and express their opinions freely.  Alex: Exactly. That's why democracy is so precious and hard-won. We shouldn't take it for granted.  Jamie: I agree. People need to value their rights and use them responsibly. (A)It encourages people to remain neutral about political issues. (B)It forces citizens to agree with the decisions of the government. (C)It allows people to have a say in decisions that affect their lives. (D)It limits how much individuals can express their personal opinions.