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【单选题】
In several nineteenth-century paintings the marble buildings of the Acropolis in Athens are portrayed as being reddish, but the buildings do not now appear reddish. The marbles natural color cannot have changed since the nineteenth century, so the paintings must not be showing the color of the buildings as they actually appeared. Which of the following, if true, most seriously undermines the argument above?A.
The Acropolis can be clearly seen from virtually any location within the city of Athens.
B.
Tiny plants called lichens living on marble can cause the marble to appear reddish.
C.
Many nineteenth-century artists strove for true-to-life accuracy in every detail of their paintings.
D.
Some types of marble are naturally reddish, whereas other types are greenish or white.
E.
Not all nineteenth-century paintings of the Acropolis show the marble buildings as being reddish.
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举一反三
【简答题】视物时能辨别颜色的感光细胞是_________，光敏感度低的感光细胞是_________。
【单选题】患者出现下列哪种情况提示预后最差
A.
CML慢性期，白细胞达500×109／L
B.
慢性期伴巨脾者
C.
加速期伴骨髓增生活跃
D.
CML急性粒细胞白血病变
E.
CML急性淋巴细胞白血病变
【单选题】患者女性，38岁。左上腹胀伴纳差、消瘦、乏力、盗汗2个月来门诊。体检：轻度贫血貌，胸骨轻度压痛，脾肋下5cm，白细胞250×10 9 /L，分类中有较多中、晚幼粒细胞，骨髓检查符合慢性粒细胞性白血病（CML）的骨髓象改变。患者出现下列哪种情况提示预后最差（）
A.
CML慢性期，白细胞达500×10 9 /L
B.
慢性期伴巨脾者
C.
加速期伴骨髓增生活跃
D.
CML急性粒细胞白血病变
E.
CML急性淋巴细胞白血病变
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