采油井应用机械堵水工艺，能够（），提高油井产量。
A、降低油井含水
B、降低生产层含水
C、减少层间干扰
D、减少层内干扰
参考答案：A, C
--- ________ people are taking action to protect the environment now.
--- Yes. ________ of my classmates come to school by bike now.
A．Less and less; Five eighths
B．Less and less; Five eighth
C．More and more; Five eighth
D．More and more; Five eighths
化肥在搬运过程中可能导致包装袋上的标签损坏，而某些化肥可以从外观上看出其种类。下列化肥中，从外观上就可以与其他化肥区别开来的是[ ]
A．尿素
B．磷矿粉
C．碳氨
D．硝酸铵
