单项选择题

Is there meaning in the length of a finger Long fingers are a (31) of refinement. A short stubby hand argues a lack of (32) Long fingers might also be a sign of a good basketball player or pianist. (33) maybe just a master at thumb wars. This (34) is sure: studies in recent years have (35) toward a number of findings. One of the studies just (36) finger length to success in financial trading.
Earlier work found that male stock traders made more money on days (37) their level of the male hormone testosterone was higher. John Coates—himself a former trader—wondered if, (38) , men with more testosterone (39) more successful traders. A way to know how much is to (40) their ring finger to their index finger. The index finger is the one (41) the thumb; the ring finger is third from the thumb. The longer the ring finger and the shorter the index finger, the (42) the testosterone exposure. The study involved forty-four traders and their (43) and losses over a twenty-month period (44) in two thousand seven. Those with the (45) experience and testosterone exposure earned about six times as much as those with the least. (46) , the research showed that traders with the most exposure (47) made the most money in wild markets (48) quick action is required. Testosterone is known to make people more (49) themselves and more willing to take risks. It may also (50) a person’s thinking ability.