男，46岁。主诉四肢麻木无力2年，2年前无诱因出现颈背部酸痛不适，伴双手麻木无力。半年后出现双手麻木逐渐向双上臂、双下肢发展，伴四肢无力。查体：C平面以下皮肤痛、温觉减退。四肢肌容积正常，四肢肌力Ⅳ级，四肢肌张力增高，双侧肱二、三头肌反射，膝跳、跟腱反射均亢进，双侧巴氏征阳性。

提示：结合病史、体征。病变定位在下列哪个部位（）

A.中央前回

B.中央后回

C.颈髓

D.旁中央小叶

E.内囊

F.脑干

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．More and more people are used to the Internet.

B．Cell pones are Becoming an important part of our life.

C．Postcards are in the danger of extinction.

D．Communications between people are becoming easier.