複選題

25
(A) Duolingo's mission is philanthropic and the approach is genius.
(B) It also charges for subscription if users want to block the advertisements.
(C) Duolingo is popular for the same reason why Candy Crush and arcade-style video games are successful.
(D) What users don't realize is that the texts they are asked to translate during the learning process are later used by real websites.
(E) Other language learning tools, Rosetta Stone, for example, have historically been only available to those with the disposable income to fund their learning.

複選題21 (A) Duolingo's mission is philanthropic and the approach is genius. (B) It also charges for subscription if users want to block the advertisements. (C) Duolingo is popular for the same reason why Candy Crush and arcade-style video games are successful. (D) What users don't realize is that the texts they are asked to translate during the learning process are later used by real websites. (E) Other language learning tools, Rosetta Stone, for example, have historically been only available to those with the disposable income to fund their learning.

複選題22 (A) Duolingo's mission is philanthropic and the approach is genius. (B) It also charges for subscription if users want to block the advertisements. (C) Duolingo is popular for the same reason why Candy Crush and arcade-style video games are successful. (D) What users don't realize is that the texts they are asked to translate during the learning process are later used by real websites. (E) Other language learning tools, Rosetta Stone, for example, have historically been only available to those with the disposable income to fund their learning.

複選題23 (A) Duolingo's mission is philanthropic and the approach is genius. (B) It also charges for subscription if users want to block the advertisements. (C) Duolingo is popular for the same reason why Candy Crush and arcade-style video games are successful. (D) What users don't realize is that the texts they are asked to translate during the learning process are later used by real websites. (E) Other language learning tools, Rosetta Stone, for example, have historically been only available to those with the disposable income to fund their learning.

複選題24 (A) Duolingo's mission is philanthropic and the approach is genius. (B) It also charges for subscription if users want to block the advertisements. (C) Duolingo is popular for the same reason why Candy Crush and arcade-style video games are successful. (D) What users don't realize is that the texts they are asked to translate during the learning process are later used by real websites. (E) Other language learning tools, Rosetta Stone, for example, have historically been only available to those with the disposable income to fund their learning.

26. What is this passage mainly about? (A) The life story of Sir Sandford Fleming. (B) The evolution of timekeeping practice. (C) The conflicts between railroad companies. (D) The time zones in the late nineteenth century.

27. Which of the following is true about the early days described in the passage? (A) The driving force for inventing the current time system was the railroad. (B) Local times were mostly set by government officials on a daily basis. (C) Standard time was a confusing concept for dwellers in the same town. (D) Citizens gathered under the sun to set their pocket watches.

28. What does the word "meridian" in paragraph 3 refer to? (A) An imaginary line. (B) A unilateral treaty. (C) A certified document. (D) A transparent sculpture.

29. According to the passage, which of the following is true about current time zones? (A) Time zones in China are ahead of its neighboring countries. (B) Countries with half-hour time zones have narrower longitude. (C) International time conferences are held in Greenwich annually. (D) The current system has a history of less than two hundred years.

30. Which of the following can be inferred from the passage? (A) The closer an area is to the equator, the longer distance its time zone. (B) People at the North and South Poles have difficulty telling time. (C) The world will operate in one single time zone in the near future. (D) Most Middle East country time zones are segmented because of war. 

31. What is this the main idea of this passage? (A) Classical AI is knowledge-based. (B) Big data do not exist. (C) A lot of scientists are currently enthusiastic about AI. (D) Cutting-edge applications of AI technology demand big data.