男，26岁，5天来鼻及牙龈出血，皮肽瘀斑。血红蛋白55g/L，白细胞10.0×109

Ⅲ级（）。

A.瘤细胞仅侵及表皮层内，即原位癌

B.瘤细胞已侵及真皮 * * 层

C.沿真皮 * * 层和网状层间扩展，但尚未侵及真皮网状层

D.侵及真皮网状层

E.已侵入皮下组织

阅读下面《论语》选段，回答问题。

　　①子贡问友。子曰：“忠告而善道之，不可则止，毋自辱也。”（《论语·颜渊》）

　　②司马牛忧曰：“人皆有兄弟，我独亡。”子夏曰：“商闻之矣：死生有命，富贵在天。君子敬而无失，与人恭而有礼，四海之内，皆兄弟也。君子何患乎无兄弟也？”（《论语·颜渊》）

　　【注】①道，通“导”。②据说司马牛是宋国大夫桓魅的弟弟。桓魅在宋国“犯上作乱”，遭到宋国当权者的打击，全家被迫出逃。司马牛逃到鲁国。

（1）根据文段，请你阐述为什么说“四海之内，皆兄弟也”。

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（2）子夏劝说司马牛，是践行孔子待友之道的典范。请你用自己的话来概括这两则材料所的待友之道。

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根据海关规定，进料加工对口合同登记备案时企业必须向海关递交必要的单证和其他相关资料。在以下四种材料中，哪一种不属于“海关认为必要的其他相关资料”( )

A．加工企业营业执照

B．加工企业的人事管理制度

C．委托加工协议

D．产品技术资料

Stress is with us all the time. It comes from mental or emotional activity as well as physical activity. It is unique and personal to each of us. So personal, in fact, that what may be relaxing to one person may be stressful to another. For example, if you’’re a busy executive who likes to keep occupied all of the time, "taking it easy" at the beach on a beautiful day may be extremely frustrating, nonproductive, and upsetting. You may be emotionally distressed from "doing nothing." Too much emotional stress can cause physical illnesses such as high blood pressure, ulcers, or even heart disease. Physical stress from work or exercise is not likely to cause such ailments. The truth is that physical exercise can help you to relax and to better handle your mental or emotional stress.

A source of stress NOT specifically mentioned in this passage is________.

A．educational activity

B．physical activity

C．mental activity

D．emotional activity

某一学校有500人，其中选修数学的有359人，选修文学的有408人，那么两种课程都选的学生至少有多少( )。

A．165人

B．203人

C．267人

D．199人