Questions 11～13 are based on a job interview at a college. How did the woman know that the college has vacancies A: Through TV ad. B: Through newspaper ad. C: Through radio ad. D: Through friends.

1又2/13*11/13

将{ 5, 11, 13, 1, 3, 6 }依次插入初始为空的二叉搜索树。则该树的后序遍历结果是（ ） A: 3, 1, 5, 6, 13, 11 B: 1, 3, 11, 6, 13, 5 C: 3, 1, 6, 13, 11, 5 D: 1, 3, 5, 6, 13, 11

如下代码的运行结果为：（）。 A: [ 5 6 7 8 9 10 11 12 13 14][ 5 1 7 8 9 10 11 12 13 14][ 5 1 2 8 9 10 11 12 13 14] B: [ 5 6 7 8 9 10 11 12 13 14][ 5 1 2 8 9 10 11 12 13 14][ 5 1 2 8 9 10 11 12 13 14] C: [ 5 1 7 8 9 10 11 12 13 14][ 5 1 7 8 9 10 11 12 13 14][ 5 1 2 8 9 10 11 12 13 14] D: [ 5 1 2 8 9 10 11 12 13 14][ 5 1 2 8 9 10 11 12 13 14][ 5 1 2 8 9 10 11 12 13 14]

Questions 11 - 13 are based on the following talk about hand preference. You now have 15 seconds to read Questions 11 - 13. Who is likely to be left-handed A: Men. B: Women. C: Children. D: Old people.

Questions 11 to 13 are based on the following talk on greenhouse gas. You now have 15 seconds to read Questions 11 to 13. Which is the most important greenhouse gas A: Methane. B: Carbon dioxide. C: Oxygen. D: Helium.

Questions 11—13 are based on the following passage. You now have 15 seconds to read Questions 11—13. What is the meaning of "a naughty boy" in this passage A: Weather is unpleasant. B: Weather is unstable. C: Weather is unbearable. D: Weather is uncanny.

2000版、2010版和2020版通则,各有几个贸易术语 A: 13、13、11 B: 13、11、11 C: 13、13、13 D: 11、11、11

Questions 11～13 are based on the following conversation. You now have 15 seconds to read Questions 11～13. What are the students doing when the man arrives in class A: Taking an examination. B: Drawing graphs. C: Giving presentations. D: Having a class of discussion.

1/（10×11）+1/（11×12）+1/（12×13） +1/（19×20）的值为（） A: 1/11 B: 1/19 C: 1/20 D: 1/21