单选题 Classify the following descriptions as referring toA PRT only B RUF only C both PRT and RUFWrite the correct letter, A, B, or C in boxes 7-12 on your answer sheet.

填空题 It is likely to be resisted by both individuals and manufacturers.

填空题 It can run at high speed in cities.

填空题 It is not necessary to share with the general public.

填空题 It is always controlled by a computer.

填空题 It can run on existing roads.

填空题 It can be bought by private buyers.