【单选题】有随机数组 ar=np.random.randint(0,100,12), 则 ar[ar<50]= -1 的语句将
【单选题】is a measurable, verifiable work poduct such as specification, feasibility study report, detail document, or working prototype.
【单选题】关于结核分枝杆菌的培养特征,下列叙述正确的是:
【单选题】Which group of the following are the names for the digital beauties mentioned in the report?
A.
Katty-ko, Pompea, and Kaya.
B.
Katty Kowaleczko, Pompea, and .
C.
Flavio Parra, Genny Tortora, and Franz Cerami.
D.
Rodolfo Perez Ayala, Pompea, and Franz Cerami.
【单选题】Which of the following statement is true according to the passage?
A.
55% of technical reports published in scientific journals are written by scientists doing their research in America.
B.
35% of all scientific journals are issued by American scientific societies.
C.
35% of all scientists come from America.
D.
35% of all scientists are doing research at American institutions.
【简答题】副结核病是由副结核分枝杆菌(MAP)引起的,以顽固性肠炎和进行性消瘦为特征的人畜共患传染性疾病,会对养殖业造成严重的经济损失。 (1)MAP与人体细胞在结构上最主要的区别是________。吞噬细胞是MAP感染早期的主要宿主细胞,MAP进入吞噬细胞后会在_______中被消化分解。 (2)细胞凋亡是一种由 决定的细胞程序性死亡,吞噬细胞的凋亡对于机体限制MAP的繁殖十分重要。研究人员研究了MAP菌...