The health of garden plants depends on the soil _____ --the proper balance of mi

题干

The health of garden plants depends on the soil _____ --the proper balance of mineral pieces, organic matter, air and water.

A．construction	B．conservation
C．corporation	D．composition.

上一题下一题 0.85难度单项选择更新时间:2019-01-28 12:01:17

小学学科试题库

初中学科试题库

高中学科试题库