下图是小梅配制100g溶质质量分数为12%的NaCl溶液的实验操作示意图:
(1)计算:需要NaCl的质量为 ____ g,需要水的体积为____ mL.
(2)上图中的玻璃仪器分别是广口瓶、量筒、____ 、____ .
(3)指出图中的一处错误操作____ .
(4)配制时应选择 ____ mL(10mL或50mL或100mL)的量筒量取所需要的水.用上述图示的序号表示配制溶液的操作顺序____ .
在“观察水的沸腾的实验”中,小明的实验记录表格如下:
时间(分)
0
1
2
3
4
5
6
7
8
温度(℃)
90℃
92℃
94℃
96℃
98℃
99℃
Hello! My name is John. I am a boy. I am a student. This is my family. My father likes to buy books online. My mother likes to buy clothes at the clothes shop. My brother likes to buy toys at the toy shop. I like to buy food online. Shopping online is fun.
Family members
Things to buy
Ways to buy
online
mother
toys
John
“人间四月芳菲尽,山寺桃花始盛开”反映的是气候的什么变化( )