将某班的学生分成x组,若每组8人,则多2人;若每组9人,则差4人,则x=______.
设将学生分成x组,
由题意得,8x+2=9x-4,
解得:x=6,
故答案为:6.
根据句意和首字母提示补全单词。
1. If you don't know the way to your school, you can ask a p______.
2. There are many new s______ on Bridge Street.
3. His sister works in a hospital, she is a n______.
4. The boy is good at maths, he is a c______ boy.
5. Henry is ill (生病), he has to see a d______.
人体内钙的主要存在形式为()
A.离子钙
B.蛋白结合钙
C.磷酸钙、碳酸钙
D.碳酸钙
E.枸橼酸结合钙