提起压在容器中水面上方的活塞，容器中的水发生汽化，如下图所示：下图中最能表示水汽化后在相同空间内粒子分布的是(    )

    Good morning, boys and girls. Here is____school news on TV. An international group is visiting our school this____. There are____teachers and two students in the group. Look!____is Mr White and he is from the UK. The woman near____is Miss Green. She is from France. The____man talking with our students is Mr Brown and he____from Canada. The beautiful girl is from Japan.____name is Judy. Look____that boy. He looks shy. Is he a Japanese, too?____, he is from Chinatown in New York. He is an overseas Chinese!

一个不透明的袋子里装有50个黑球，2个白球，这些球除颜色外其余都完全相同．小明同学做摸球试验，将球搅匀后，从中随机摸出一个球，记下它的颜色后放回袋中，然后再重复进行下一次试验，当摸球次数很大时，摸到白球的频率接近于（　　）

在⊙O的内接四边形ABCD中，AB=AD，∠C=110°，若点E在$\stackrel{\wedge }{AD}$上，求∠E的度数．