Directions: In this section, you will hear a long conversation. At the end of the conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A）, B）, C）and D）.[音频]12. What are the speakers talking about?
A. Buying some fitness equipment for the new gym.
B. Opening a gym andbecoming personaltrainers.
C. Signingup for a weight-loss course.
D. Trying out a new gym in town.
查看答案
13. What does the gym offer at its opening?
A. Professional personal training.
B. Free exercise for the first week.
C. A discount for a half-year membership.
D. Additional benefits for young couples.
14. What is the man concerned about?
A. The safety of weight-lifting.
B. The high membership fee.
C. The renewal of his membership.
D. The operation of fitness equipment.
15. What do we learn about the woman from the conversation?
A. She wants her invitation renewed.
B. She used to do 200 sit-ups every day.
C. She knows the basics of weight-lifting.
D. She used to be gym's personal trainer.
一个函数如果在点x0处不存在极限,则它在该点处一定不连续。
A. 对
B. 错
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