如图所示,三个相同的容器内水面高度相同,甲容器内只有水,乙容器内有木块漂浮在水面上,丙容器中悬浮着一个小球,则下列四种说法正确的是( )
A:三个容器中,丙容器对水平桌面的压力最大
B:三个容器对水平桌面的压力相等
C:如果向乙容器中加人盐水,木块受到的浮力变大
D:如果向丙容器中加人酒精,小球受到的浮力不变
The bottle is empty. Can you help me it some water?
2016年深圳市生产总值同比增长9%,记作+9%,而尼日利亚国内生产总值同比下降2.24%,应记作( )
现有资料表明:①K+不能通过双分子层的人工膜,②缬氨霉素是一种脂溶性抗菌素,与K+具有特异亲和力,③在人工膜上加少量缬氨霉素,K+可以通过膜,Na+仍不能通过膜。下列关于K+能通过膜Na+不能通过膜的原因解释中,正确的是
A teenage girl couldn't stand(忍受) her family rules,so she left home. She wanted to be a star and became 1. But she had a little education and a few years later,she had to ask for food on the street for a living. Now her father has2 . Her mother is an old woman. But she is still 3 her daughter. She went to every corner of the city. Everywhere she goes,she put up a big photo of herself on the wall. At the lower part of the 4 she writes,“I still love you …Come back home!” One day,the daughter saw one of the photos. She was so surprised that she couldn't believe her 5. “Is that my mother?”She moved6 and read the words,“I still love you…” She cried. When she got home,it was early morning. She pushed the door. The door 7 itself. She rushed to the bedroom at once. Her mother was sleeping there. She woke her mother up,“It's me!Your daughter is back home!”The mother and daughter looked at each other excitedly,full of 8tears. The daughter asked,“ 9is the door unlocked?A thief could get in.” The mother answered softly,“The door 10 locked after you left. We miss you all the time. We believe that you'll come back some day.”The door of parents’ love for their children will never be closed.