评价废弃物无害化效果的指标是
A.有机物破碎和有间隙
B.无块状粪便
C.肥料质量和卫生效果
D.无恶臭味
E.体积缩小
参考答案：C
哪几种疾病所致的肠梗阻属闭袢性肠梗阻
A．肠蛔虫堵塞
B．乙状结肠扭转
C．横结肠癌
D．小肠套叠
Computer ______ is a complex consisting of two or more connected computing units, it is used for the purpose of data communication and resource sharing.
A．storage
B．device
C．network
D．processor
