比喻主要可以分为（）、（）、（）三类。

患者女性，51岁，农民。因“阵发性胸闷、心悸12小时，伴晕厥1次”入院。患者于入院前12小时清晨起床蹲位排便后起立行走时突发胸闷、心悸、黑矇，呼之不应，持续约10分钟，由急救车急诊入院。既往身体健康。查体：神志清，心肺未发现异常体征。拟诊“冠心病，心绞痛”给予输液治疗观察8小时左右未再发作，但患者下床活动行走约10m处又突感心悸、胸闷，心电图示窦性心动过速，心率120次∕分，给予吸氧，舌下含服硝酸异山梨醇片5mg无好转，约10分钟患者出现呼吸浅快、意识不清，心电监护示：心室颤动。

该患者经心肺复苏5分钟后，恢复自主心律，1分钟后又变成心室颤动，如此反复3次，超过15分钟，接下来如何处理（）

A.继续心肺复苏

B.考虑溶栓治疗

C.静脉滴注碳酸氢钠纠正酸中毒

D.静脉注射硫酸镁

E.使用多巴胺升压药物

F.静脉注射肾上腺素

下列各项中不是光合作用提供的是[ ]

A．动物和人类食物的来源  

B．动植物和人类的能量来源  

C．自然界二氧化碳的来源  

D．动植物和人类所需氧气的来源

当前我们国家的根本任务是[ ]

A．解放生产力，发展生产力

B．实现共同富裕

C．集中力量进行社会主义现代化建设

D．打好扶贫攻坚战，彻底消除贫困

First Lady Michelle Obama urged students to visit China at the "100,000 Strong" China Study Abroad forum at Howard University in 2011.

President Barack Obama announced the "100,000 Strong" Initiative （倡议） during his 2009 visit to China. The program aims to increase and diversify the number of American students studying in China by making studying abroad more affordable.

During the event at Howard, Mrs. Obama spoke about the importance of studying abroad, something she never did while in college. "Studying in countries like China is about so much more than just improving your own prospects（前景） in the global market. The fact is that with every friendship you make and every bond of trust you establish you are shaping an image of America projected to the rest of the world," she said.

David Marzban from Pepperdine University recalled a time when he formed a cross-cultural bond with a complete stranger at a restaurant near Fudan University in Shanghai. He noticed a young chef signaling him to come over. "He presses the play button on his media player and starts singing 'California Dreaming' and wants me to sing along with him," Marzban said. "At this time I knew a great friendship had started during my first two weeks in China."

Nicole Baden, a senior communications major at Howard University, recalled how her time in China really helped her master the language. "You have to experience the culture while learning the language to really master it and to understand why things are how they are compared to your own culture," Baden said.

Mrs. Obama encouraged students to set aside concept that studying abroad is for rich kids only or for those attending certain schools. In addition, the first lady announced that the Chinese government is giving 10,000 "Bridge Scholarships" to cover costs for American students and teachers studying in China.

Students from several schools attended the forum. 12-year-old Sarah Davis, who studied in China last summer, said she was very excited to hear Michelle Obama talk about the country. “I love Chinese. Out of all the languages I’ve learned, Chinese is the most difficult and interesting,” she said.

小题1:The examples mentioned in the passage mainly indicate that _____.

A．the US students’ life in China is helpful and worthwhile

B．all students of the US are living a comfortable life in China

C．Chinese young people are friendly to foreigners

D．it isn’t realistic for some US young people to study in China小题2:What can we infer from the passage?

A．Baden came to China to study the differences between English and Chinese.

B．Poor children from America have no opportunity to study in China.

C．David Marzban made a Chinese friend in an unexpected way in China.

D．Michelle Obama called on US students to study in China at a government meeting.小题3:What is the best title for the passage?

A．The US has an ambitious program for Americans studying in China.

B．Michelle Obama encourages American students to study in China.

C．More American students plan to study in China.

D．China is attracting more and more international students.

服务是典型的生产和消费同时进行的过程。