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【单选题】
免疫应答时，细胞与细胞之间不受MHC限制的是()A.
NK细胞杀伤靶细胞
B.
CTL识别靶细胞抗原
C.
Th1细胞与APC
D.
Th2细胞与B细胞
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举一反三
【单选题】The influential Peruvian development economist Hernando de Soto has argued that much of the developing world will fail to reap the benefits of capitalism until _____.
A.
they have political stability
B.
they invest in infrastructural development
C.
they have better defined and secure property rights
D.
they have adequate market regulation
【单选题】在下列电机中,( )既可通过闭环实现速度或位置控制,又可作步进方式运行,且电机转速不受负载影响,稳定性高。
A.
步进电机
B.
直流伺服电机
C.
交流同步伺服电机
D.
笼型交流异步电机
【判断题】Peruvian development economist Hernando de Soto has argued that the chronic inability of property owners to establish legal title to the property they own is a key problem for innovation, and entrepre...
A.
正确
B.
错误
【简答题】A. 1 、下列加点字的读音完全相同的一项（ ） B. B 澄澈田塍称心如意游目骋怀 C. C 嗜好 狭隘 苦心孤诣 浮粪四溢 D. D 渗浸觐见噤若寒蝉加官晋爵
【单选题】The influential Peruvian development economist Hernando de Soto has argued that much of the developing world will fail to reap the benefits of capitalism until they: 颇具影响力的秘鲁发展经济学家赫尔南多•德索托(Hernando de...
A.
have political stability.政治稳定。
B.
invest in infrastructural development.投资基础设施建设。
C.
have better defined and secure property rights.拥有更明确和更安全的产权。
D.
have adequate market regulation.有足够的市场监管。
相关题目：
【单选题】在下列电机中,( )既可通过闭环实现速度或位置控制,又可作步进方式运行,且电机转速不受负载影响,稳定性高。
A.
步进电机
B.
直流伺服电机
C.
交流同步伺服电机
D.
笼型交流异步电机
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