
C . 自攻螺钉 ①红细胞 ②白细胞 ③血小板.
材料一:第五十四条:中华人民共和国外交政策的原则,为保障本国独立、自由和领土主权的完整,拥护国际的持久和平和各国人民间的友好合作,反对帝国主义的侵略政策和战争政策。
——《中国人民政治协商会议共同纲领》
材料二:我们相信,中印两国的关系会一天一天地好起来。……新中国成立后,就确立了处理中印两国关系的原则,那就是互相尊重领土主权、互不侵犯、互不干涉内政、平等互惠、和平共处的原则。
——《周恩来选集》下卷
材料三:我们并不要求各人放弃自己的见解,因为这是实际存在的反映。但是不应该是它妨碍我们在主要问题上达成共同的协议。我们还应在共同的基础上来相互了解和重视彼此的不同见解。万万亚非人民期待着我们的会议成功。
——周恩来在万隆会议上的讲话
Three divers enter a hole leading to a water-filled cave on Mexico's Yucatan Peninsula. They swim for an hour. Finally, they reach a large room 60 feet underground and about the size of two basketball courts. Here, they discover an upside-down human skull. Other bones lie nearby.
The team came across the skull in 2007. The divers then told the Mexican government about the finding. Soon the government formed a team of scientists to look into it. The group, which included archaeologist Dominique Rissolo, believed that the skull belonged to someone who lived in the last ice age. At the ice age some twenty thousand years ago, sea levels dropped and new land appeared. Over time, rain and wind ate holes into some of the land. "The person may have died after entering the cave," Rissolo says. Then, when the ice age ended some ten thousand years ago, sea levels rose. Water flooded the cave, covering the remains.
Worrying that moving the skull might destroy it, scientists decided to examine it at its watery resting place. They collected information about the skull and other pieces of bones. They found that the bones belonged to a 15- to 17-year-old girl who lived at least twelve thousand years ago. The team named her after a type of water nymph(仙女) in Greek myths: the Naiads(Naia).
Naia is the oldest nearly complete human skeleton (骨架) ever found in the Americas. DNA tests showed that she's a direct ancestor of present-day Native Americans. Naia's DNA also matches with people native to Siberia, a part of Russia. Scientists have long thought that ancient people from this area arrived in Alaska during the last ice age. They were the first humans to live in the Americas. And Naia proves how far south they went.
In 2014 the scientists decided to bring up Naia's skull from the cave to protect it from curious divers. So it was taken to a lab, where it remains today.
2CH3OH+3O2+4KOH=2K2CO3+6H2O

污染瓶内试剂
B .
受热仪器破裂
C .
容易造成酒精中毒
D .
造成液体多加
B .
C .
D . 无法判断
①意识的能动性加深了重要事件对人的刺激 ②事件对于个人的价值决定了意识反映的效果
③时间的推移不会使人们的记忆发生质的变化 ④重要事件具有明显区别于普通事件的特殊性
且
, 则
B .
C .
D . 3
①社会主义的各项事业在不断发展 ②各种制度在不断完善
③综合国力在不断提升 ④人民生活水平在不断提高,文化事业逐步走向繁荣