题目：
For an activity, the optimistic, most likely and pessimistic estimates are 12, 16 and 18 respectively. Which of the following statement is correct
A) There is 68.26% chance that the activity will be completed in 15 to 17 days.
B) There is 95.44% chance that the activity will be completed in 15 to 17 days.
C) There is 68.26% chance that the activity will be completed in 14.67 to 16.67 days.
D) There is 93.73% chance that the activity will be completed in 15 to 17 days.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
近中咬面银汞充填完好，叩（+），冷测反应均迟钝，热水可起痛，持续数分钟。
冠完整，牙尖高耸，见近中边嵴一隐裂纹，涂碘酊染色不明显，叩：（-），在裂纹处热测均较对照牙略敏感，其余未见异常。
残根，叩（-），周围牙龈略红，探之易出血
再行根管治疗
调
根管治疗