Colleen Saffrey would most probably agree that______.
A. people should learn to avoid regret
B. regret is no longer a negative emotion
C. though negative, regret is of value to people
D. regret can help people find the problems
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The EUs attitude towards the awake system is one of_____.
A. cautious optimism
B. insufficient support
C. sheer confidence
D. great skepticism
在带压不置换焊补中，容器及管道必须连续保持稳定负压，这是动火安全的关键。()
工件接触面有污垢会增大电阻，使电阻焊时产生更多热量，对焊接有利。()
According to Paragraph 3, informants among the American federal employees_____.
A. disclose misbehavior. externally when they are disappointed internally
B. get more protection than people who disclose misbehavior. externally
C. have less rights than prisoners
D. get as much protection as before
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