题目内容
（请给出正确答案）
[主观题]
3. He spoke French so __________ （fluent) that I took him for an Frenchman by mistake.
提问人：网友lqtoaigh
发布时间：2022-01-07
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He saw a trainer nearby and asked why these ________63 (animal just stood there and made no attempt to get away. “Well&39;” 64________ trainer said, “when they were very young and much 65________ (small, we used the same size ropeto tie them and, at that age, it was enough to hold them. As they grow up, they are conditioned to believe they cannot breakaway. They believe the rope can still hold them, so they never try to break free.”
The man was 66________ (surprise. These elephants could at any time break free from the ropes but because they67________ (believe they couldn’t, they were stuck right where they were.
Like the elephants, how many of us go through life with a belief 68________ we cannot do something, simply becausewe failed at it once before？
Failure is part of 69________ (team. We should never give 70________ the struggle in life.
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This is actually related to the photon propagator
,with
while for static case,
. Please prove the relation
.
