变压器铁心叠装法中,损耗最小的是()。
A.直接
B.半直半斜
C.斜接45°
D.搭接
参考答案:C
克罗恩病内镜下的表现( )
A.血管模糊B.纵行或匐行溃疡C.黏膜细颗粒状D.黏膜弥漫充血水肿和多发小溃疡E.黏膜脓性分泌物
_____ of the workers in this factory is about fifty. [ ]
A. A number
B. The number
C. Many
D. A lot