A:在物质的量浓度为0.14mo1L的氯化钠溶液中DNA的溶解度最小
B:DNA遇二苯胺在沸水浴的条件下会变蓝
C:DNA不溶于冷酒精而细胞中的一些物质易溶于冷酒精
D:柠檬酸钠具有抗凝血的作用
阅读短文, 选择正确答案。
I am an English girl. My name is Kate Green. I am thirteen. I am at school now. Look! This is my school. It is Hongda School. I am in Class Eight. I am in Row Four. I am in Team Six. I am Number Five. At school I have a good friend. She is a girl, too. Her name is Ann. She isn’t at school today. I think she is at home. My teacher's name is Mr. Smith. He is a very good teacher. Today he wears (穿) a new T-shirt. He looks very young. I don't know his age. But I think he is old, because (因为)he has a son and a daughter. His son is a doctor and his daughter is a policewoman.
根据拼音写出相应的词语。
我们生活中的许多现象,往往蕴含的地理知识,下列现象中,与地球自转有关的是( )
在纪念中国人民抗日战争暨世界反法西斯战争胜利70周年之际,2015年8月29日,十二届全国人大常委会第十六次会议表决通过了关于特赦部分服刑罪犯的决定。依法实行特赦( )
①国家尊重和保障人权,推进政治文明②体现了社会主义的优越性
③有利于缓解矛盾冲突,维护社会稳定④表明人民民主专政是社会主义的生命
昨____ 晴____ 故____
作____ 情____ 姑____