操作方法:先从盒中摸出8个球,画上记号放回盒中,再进行摸球实验,摸球实验的要求:先搅拌均匀,每次摸出一个球,放回盒中,再继续.
活动结果:摸球实验活动一共做了50次,统计结果如下表:
球的颜色
无记号
有记号
红色
黄色
摸到的次数
18
28
2
推测计算:由上述的摸球实验可推算:
俄罗斯的奥伊米亚康被称作北半球的“____ 极”.
One day Skygirl went to our classroom with Skyboy. She was very h____. She took a hamburger and a cola w____ her. She wanted to r____, to have some food and drink and t____ to boys and girls in the classroom. She was not happy when she saw the s____ in the classroom. What does the sign mean? It says: "Don't run in the classroom. Don't talk to each other in class. Don't ear or d____ in class. ""I don't want to be in the classroom. Let's f____ away. "The Supergirl said to the Superboy. They came to the Garden City. Garden City is an i____ place for the Superchildren to play.