单选题 . ①In the 1920s, Gerstmann described a set of problems found in people who have suffered damage to the brain's left parietal lobe, problems that include being unable to understand arithmetic and having difficulty identifying one's fingers. ②There is still no agreement on whether the symptoms Gerstmann noticed constitute a syndrome, but the parts of the brain used for storing facts about numbers and for representing the fingers are close to each other. ③Mental representations of numbers and of fingers may therefore be functionally connected. ④A 2005 experiment had people perform some tasks requiring dexterity and others involving matching pairs of numbers, while an area of their parietal lobes—the left angular gyrus—was stimulated by a magnetic field. ⑤Facility at both sets of tasks was impaired.

23. The author of the passage would most likely agree that the highlighted statement suggests ______

A、 a flaw in the experiment conducted in 2005
B、 a means by which dexterity might compensate for a loss of arithmetic ability
C、 an explanation for some of Gerstmann's observations
D、 an anomaly in some of Gerstmann's results
E、 a reason to doubt damage to the left parietal lobe as a causal factor in certain symptoms

【正确答案】 C

【答案解析】 C：古茨曼的观察是左顶叶受损使两种能力受到破坏，而正是因为两个部分靠得很近，所以左顶叶这一个部位受损，两种能力都受影响，因此选项C正确。