机械性单纯性肠梗阻腹痛的特点是标记一下&nBsp;
A．持续性隐痛&nBsp;
B．阵发性隐痛&nBsp;
C．持续性绞痛伴肠鸣音亢进&nBsp;
D．阵发性绞痛伴肠鸣音亢进&nBsp;
E．持续性绞痛伴呕吐