[多选题]线切割加工中工作液过滤可用( )。
A.塑料网
B.铜网
C.磁钢
D.泡沫塑料
E.隔墙

Education is compulsory and free for every child in the United States. Most children start school by the age of six.
They attend eight years of elementary school and four years of high school (or secondary school). The money for free public school comes from taxes, and each state is responsible for its own education system. State legislatures set the educational requirements but leave the management of the school in the hands of the local communities. Most states require their children to go to school until a certain age. This age varies from 16 to 18 years according to the law of the individual states. The Federal government contributes funds to the states for additional schools and school services.
After graduation from high school, a student can start his higher education in a two - year college, a four - year college, a university, or a specialized professional school -- either public or private. Most colleges admit students on the basis of their high
A. Two percent of the people in the country.
B. Children under the age of 16.
C. The students who have to work.
D. One third of the population.