保险不是改变你的生活，而是防止你的生活被改变。这句保险宣传语说明（  ）

①保险让每个家庭拥有平安②订立保险的原则是自愿、公平互利和协商一致③购买商业保险是规避风险的有效措施④通过购买商业保险，投保人可以把风险转移给保险人

颜色变化常作为生物实验结果观察的一项重要指标。下面是学生在实验中遇到的问题，其中正确操作或想法是（  ）

雌蛙的卵巢中有初级卵母细胞6000个，若全部能经减数分裂产生卵细胞，从理论上计算所生成的卵细胞和极体数分别是

Zhao Yan: Look at this photo, Wang Ying.

Wang Ying: Oh, I remember. It was Liu Ning, you and I that were at the gym. It was rainy that day. We went to the gym to watch Lin Dan play badminton. He played with a player of Australia. We yelled for Lin Dan. He played very hard. Finally he won. We were happy. We jumped up and down.

⑴Zhao Yan, Liu Ning and Wang Ying ____      A. happy.

⑵They watched ____                          B. won.

⑶Lin Dan played with ____                    C. were at the gym.

⑷Lin Dan ____                                D. a player of Australia.

⑸We were ____                               E. a badminton game.