[单项选择]成年男性，三月来双下肢无力、双下肢麻木逐渐发展到腰部，背后疼痛且咳嗽时加剧。查体左半侧Ts下痛温觉消失；右下肢肌力Ⅲ度，腱反射亢进，Babinski征阳性，右下肢足趾振动觉、位置觉消失。（以下3题共用题干）病变脊髓处，MRI表现为（ ）。
A. 脊髓呈梭形膨大，广泛低信号
B. 正常脊髓
C. 脊髓不膨大，髓内广泛点状高信号
D. 脊髓外高信号肿块
E. 中央管扩大呈空腔

Dear Sirs,
We thank you for your promptness in delivering the Cocoa bean we ordered on 24th September, but we find that only 485 tons of the same were delivered whereas our order was for 500 tons.
To support our statement, we enclose one copy of Inspection Certificate from Shanghai Commodity Inspection Bureau. On basis of the Inspection Certificate, we hereby lodge our claim (索赔) with you for ￡5, 000 in all.
We are sure that you will give our claims your most favorable consideration and look forward to your settlement at an early date.
Yours faithfully
Enclosures: As stated

There are many differences .between communicating in written and spoken words—one to one or one to many. Because speaking is face to face and personal, it is much more direct than writing.. Hand and body gestures, facial expressions, and vocal variety help greatly to support face-to-face communication. It is also reinforced by instant feedback from listeners in the form of smiles, frowns, applause, catcalls, clenched fists, and so on. An alert speaker who is sensitive to feedback can "shift gears" and adapt to changing circumstances.
41. The differences between talking and writing
Writing, however, depends