关于乳腺摄影专用正色胶片特点的叙述，错误的是（）
A.高分辨率
B.高对比度
C.单层乳剂
D.绿光敏感
E.银盐粗大
参考答案：E
The country has already sent up three unmanned spacecraft, the most recent__at the end of last March.
A．has been launched
B．having been launched
C．being launched
D．to be launched
上述哪项为失笑散的主治证（）
A.瘀血内停，脉道阻滞之心腹刺痛证
B.肝郁化火，气滞血瘀之心腹胁肋诸痛证
C.跌打损伤，瘀血阻滞证
D.血瘀寒凝，瘀血阻滞证
E.胸中血瘀证
