My father is very busy. He has things to do. [ ]
A. so many
B. so much
C. such many
答案:A
基因治疗
A.可治疗严重联合免疫缺陷病B.可治疗细胞免疫缺陷C.可治疗腺苷脱氨酸(ADA)缺陷所致的严重联合免疫缺陷病D.可治疗选择性IgG类缺陷,Ig水平近于正常的抗体缺陷E.可治疗选择性IgA缺陷
深冷装置原料气脱水采用()
A、活性氧化铝
B、活性炭
C、分子筛
D、硅胶