锁肛痔的特点为()。 ["排便次数增多","大便形状改变","直肠指检可触及硬性肿块或溃疡","便内有血、脓、黏液","以上均是"]
炮采工作面炮眼的角度应满足哪些要求?
下列有关乳腺癌的危险因素的叙述错误的有()。 ["哺乳时间长","月经初潮年龄早","绝经早","初次足月产年龄早","有乳腺癌家族史"]
乳腺癌辅助性化疗的适应证除外()。 ["ER-/PR-","N+","T>1cm/SBRⅢ","N-","Her-2/neu强阳性"]
乳腺癌根治术后锁骨上/腋顶野的放射治疗剂量为()。 ["60Gy/6周","40Gv/4周","56Gy/5~6周","50Gy/5周","以上都不是"]
简述爆破落煤的主要操作过程、炮眼布置形式及其适用条件。