第22题: [单项选择]()is the main reason that reduces the power advantage of a two-stroke engine over a same size four-stroke one to about() A. Inefficient scavenging;twice B. Inefficient scavenging;1~8 times C. Fewer strokes in a circle;twice D. Fewer strokes in a circle;1~8 times 参考答案:B
第32题: [单项选择]下列的哪一项在小B淋巴细胞淋巴瘤为阴性() A. CD20 B. CD5 C. CD10 D. CD79α E. IgM 参考答案:E 答案解析:小B细胞淋巴瘤的免疫组化染色结果显示肿瘤细胞CD20、CD79a、CD5、CD10、部分CD23、bcl-2均阳性,UCHL1、CD4、CD8、CD38、cyclin均阴性。可见小B淋巴细胞淋巴瘤表达