导致 * * 皮肤出现桔皮样改变是由于
A.癌性溃疡
B.皮肤多个瘤样结节
C.癌灶侵犯库柏韧带
D.癌灶侵入乳管
E.癌细胞堵塞皮下淋巴管
参考答案:E
如图11-3-9所示,A、B叠放在光滑水平地面上,B与自由长度为L0的轻弹簧相连,当系统振动时,A、B始终无相对滑动,已知mA=3m,mB=m,当振子距平衡位置的位移x=时系统的加速度为a,求A、B间摩擦力Ff与位移x的函数关系.
图11-3-9
根据句意和汉语提示写出单词完成句子 (5分)
小题1:He is not tall -- _________ (几乎) 1.70 metres.
小题2:Many __________(外国的)friends come to my home town every year.
小题3:The boys and the girls are _____________ (喝彩) for their football team.
小题4:I am interested in IT. I plan to take a (课程) in it.
小题5:My father was unhappy because I made the same (错误) again.