A. which B. that C. as D. it
A. have B. find C. receive D. accept
A. 队列 B. 数组 C. 栈 D. 记录
A. 运输节水 B. 农业节水 C. 工业节水 D. 城市节水 E. 非常规水源利用
A. which B. when C. where D. that