大小分级机利用通过孔径（）的分级或由窄至宽的分级档将产品分成若干级。
A、有高到低
B、由大到小
C、由小到大
D、由低到高
参考答案：C
—I'm trying to find yesterday's newspaper. Have you seen it?
—I'm afraid that I ________ it away. I thought you had finished reading it.[ ]
A. threw
B. had thrown
C. throw
D. will throw
LOD法计算的统计量Z，当Z=0.58时，表示（）
A.肯定连锁
B.支持连锁
C.否定连锁
D.需继续调查积累家系资料
E.可能不连锁
