有两个学生在高考中双双落榜,都非常难过。其中,甲几天后就振奋精神,重新开始复习功课,以饱满的精神重整旗鼓,准备第二年再考。而乙却一直情绪低落,唉声叹气,愁眉苦脸。这个事例说明了 (　　)

第二次工业革命的核心和标志是（    ）

    I work as a volunteer for a group that helps the poor in Haiti. I decided to take my son Brain there for a week， hoping to educate(教育) him.

    Before getting out， I told Brain this trip would be tiring and hard. For the first two days， he said almost nothing. Then on the third day， when we were climbing over high rocky mountains(高山)， he turned to me and smiled， “Really hard.”

    After that， a five—year—old girl， wearing a too large dress and broken shoes， followed Brain around. Later he said， “I wish I could speak French.” I was surprised that this was from a boy who always hated French classes.

    However， the moment that really reached my heart occurred in a village in the mountains. I was interviewing(采访) a woman villager for an article. By working hard， she learned to read and write and became one of the leaders of the village.

    Learning her story， Brain was greatly touched. His eyes were wet and there was love and respect(尊重) on his face. He finally understood the importance of my work. When leaving for home， Brain even offered to stay in as a volunteer. This trip was very meaningful.

阅读下面材料，回答问题．

近年来，我国多地发生了有H7N9型禽流感病毒引起的传染病．目前已知H7N9禽流感主要传染途径为人与带病禽畜接触传播，尚未发现人传染人的病例．有关专家建议普通人预防禽流感应做到：（1）注意个人卫生，保持勤洗手、室内勤通风换气、注意营养．（2）保证充足的睡眠和休息，加强体育锻炼．尤其在接触禽畜后及时彻底洗手．（3）尽可能减少与禽畜不必要的接触，特别注意尽量避免接触病死禽畜．食用禽肉蛋时要充分煮熟．（4）生熟食物要分开处理，当手部有伤口，处理肉类时建议佩戴手套．