He was too excited _________. [ ]
A. speak
B. to speak
C. not to speak
D. speaking
答案:B
为了解某种产品的质量,从中抽取了200个进行检测,其中合格的有190个,则这种产品的不合格率为______.
女,49岁,发现右乳肿块2个月,质硬,表面不光滑,与皮肤及深部无粘连,无压痛。右腋窝可触及一个杏仁大淋巴结,尚活动。若为乳腺癌,属下列哪期()
A.TisN0M0
B.T1N1M0
C.T2N0M0
D.T2N1M0
E.T2N2M0