人工插捣制作试件插捣上层时,捣棒应贯穿上层后插入下层()mm。
A.12~15
B.20~30
C.10
D.50~60
参考答案:B
__________ the days went on, the weather got worse. [ ]
A. With
B. Since
C. While
D. As
过氧化物酶呈强阳性反应多见于
A.急性早幼粒细胞白血病B.急性粒细胞白血病C.急性单核细胞白血病D.急性淋巴细胞白血病E.急性粒一单细胞白血病