题目内容

下列哪项说法是正常的

A. 肝囊肿通常为低回声
B. 肝囊肿通常包膜较厚，边界不清晰
C. 肝囊肿为单发，通常不会多发
D. 肝囊肿合并出血或者感染时，囊内可以出现细小的点状回声
E. 以上说法都不对

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共产主义是崇高的社会理想，共产主义远大理想的最终实现是一个、艰辛的历史过程，需要一代又一代人付出艰苦的努力。