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【单选题】
目前认为骨骼肌细胞实现兴奋——收缩耦联的关键因素是( )A.
兴奋沿横管系统传至肌细胞内部
B.
兴奋沿肌浆网传播触发钙离子的释放
C.
三联管兴奋引起终末池释放钙离子
D.
钙离子与肌钙蛋白亚单位 I 的结合
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举一反三
【简答题】对于施工周转材料，能计入材料定额消耗量的是（ ）。
【单选题】What are the main features of Vault III?
A.
It is the oldest building resembling a galley.
B.
It is likely the headquarters of the troops of Vault I and Vault II.
C.
It is the largest one among the three vaults.
D.
It has a 1. 95-meter-high robust marshal as the commander.
【简答题】San Francisco's Chinatown is the biggest and oldest in the country. It's the third most visited tourist destination in the city. It's also the city's most densely populated neighbor- hood. So why are....
【简答题】Carl: Hi. My name's Carl. Nice to meet you. Pancho: Nice to meet you, too. My name is Francisco. Carl: What? Pancho: Francisco, but all my friends and family back in Peru call me Pancho. Carl: Okay, P...
【单选题】听力原文： Man: My secretary tells me that you'd like to know something about mechanical engineering. What I can do is give you some idea of the variety of specialties within the field. Woman: I'd apprecia...
A.
She is planning to buy a refrigerator.
B.
She is interested in fashion design.
C.
She wanted to know something about a subject.
D.
She asked the man to help her find a job.
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