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.
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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
( )代表了人类社会迄今最先进的人生追求。
A. “服务我党、奉献社会”
B. “服务家庭、奉献社会”
C. “服务人民、奉献社会”
D. “服务人民、奉献家庭”
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