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举一反三
【单选题】根管充填后，X线片示根管充填为超填的影像是（）
A.
距根尖端1.5mm，根尖部根管内无任何X线透射影像
B.
在距根尖端5mm处从近中侧穿，根尖部根管内无根充物
C.
齐根尖端，根尖部近根管壁处有线状X线透射影像
D.
出根尖孔约1.5mm，根尖部根管内无任何X线透射影像
E.
仅在一个根管内，另一根根管内无任何根充物
【单选题】以下关于速度影像法的表述,正确的是( )
A.
速度影像法既适用于构件，又适用于机构。
B.
速度影像法只适用于构件，不适用于机构。
C.
速度影像法不适用于构件，但适用于机构。
D.
所有选项均不正确。
【单选题】Friction between America’s military and its civilian overseers is nothing new. America’s 220-year experiment in civilian control of the military is a recipe for friction. The nation’s history has seen...
A.
Roosevelt was better prepared to be a wartime president than Lincoln
B.
in the Second World War, the relationship between the White House and the generals was intense
C.
both Lincoln and Roosevelt were good wartime presidents, although their actual way of dealing things may be different
D.
George Washington was actually the best president