Negtive selection plays a very important role in maturate of T cell.
阴性选择是幼稚T细胞在分化发育过程中一个非常重要的步骤。
Results: Incidence of nosocomial lung infection was as high as 85.7% with Gram negtive bacteria species as main pathogen.
结果：脑出血患者并发医院内肺部感染的几率极高。以G-菌多见，占85.7%。
BCG antigen was also positive in all the 20 multibacillary leprosy cases, 28/30 paucibacillary leprosy cases, 8/9 other mycobacterial or fungal cases, negtive in the 10 non-infectious cases.
BCG抗原20例多菌型麻风全部阳性，30例少菌型麻风中28例阳性，9例其他分支杆菌、真菌病中8例阳性，10例非感染性皮肤病未见表达。
Most coal selecting plant for power use have difficulties in simple tech. , single structure, wed capacity in market and negtive ability in meeting the requirements for environment protection.
动力煤选煤厂大多存在洗选工艺简单、产品结构不灵活、难以适应煤炭市场及环保要求的现状。
Most coal selecting plant for power use have difficulties in simple tech. , single structure, wed capacity in market and negtive ability in meeting the requirements for environment protection.
动力煤选煤厂大多存在洗选工艺简单、产品结构不灵活、难以适应煤炭市场及环保要求的现状。
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