美国拥有完整的工业部门体系，工业产品________齐全，________大，________先进，是世界上最发达的工业国家。
种类；产量；技术
It is required by law that the children above six years old in our country ________ to school to receive education.
A．would be sent
B．are sent
C．be sent
D．will be sent
导湿温性
