One hundred boys went on a school outing. Eighty-one percent of the boys lost a shoe, 82 percent of the boys lost a sock, 77 percent of the boys lost a handkerchief and 68 percent of the boys lost a hat.　　What is the minimum percentage who lost all 4 items?

[单选题]下列各项，属胎膜早破时阴道流液pH值的是（）。

[单选题]在学校中，发挥学科教学工作组织管理作用的基层组织是（）

[问答题]什么是信息化战略规划？

[多选题]为提高公允价值计量和相关披露的一致性和可比性，企业应当将估值技术所使用的输入值划分的层次包括（）。

[单选题]心源性水肿常先出现于（）。

[单选题]了解问题的基本症结及每个原因所占整个问题的百分比，抓住重点，对症下药，解决问题的图形叫做（）

[问答题]麻疹控制关键点

[填空题]轨道电路故障，闭塞机不能复原时，经确认列车到达后，由（）办理事故复原。

[判断题]要使水泥硬化快，强度高，就必须降低C3A和C3S的含量。

[单选题]在500kV及以上的GIS壳体制造过程中，相对于传统TIG+MIG的焊接方法，变极性等离子弧焊的优点没有（）

[问答题]One hundred boys went on a school outing. Eighty-one percent of the boys lost a ...

[问答题]One hundred boys went on a school outing. Eighty-one percent of the boys lost a ...

[问答题]One hundred boys went on a school outing. Eighty-one percent of the boys lost a ...

[单选题]There are ten ______ teachers and two hundred ______students in the school.

[判断题]“Education of the countryside school”属于Education（2N）school 的检索结果。

[单选题]He was one of the boys who _____ late for class.

[单选题]The boys enjoyed（）football very much.

[单选题]He was one of the boys who _____ late for class.

[单选题]At lunch one of the Churchill boys

[单选题]The boys enjoyed（）football very much.