矽肺和煤工尘肺最常见的CT表现是（）
A.不规则阴影
B.大阴影
C.淋巴结钙化
D.胸膜斑
E.圆形小阴影
参考答案：E
胃容受性舒张是通过下列哪一途径实现的
A．交感神经兴奋
B．迷走神经末梢释放ACh
C．迷走神经末梢释放某种肽类物质
D．壁内神经丛兴奋
E．迷走神经引起胃粘膜释放前列腺素
His report was so exciting that it was __ interrupted by applause（掌声）.
A．constantly
B．constant
C．seldom
D．never
