货物的损坏是因不可抗力所造成的，承运人不负赔偿责任。
参考答案：对
–With the final examination approaching, I’m getting anxious. As a consequence, I have no appetite for anything and even can’t fall asleep.
-- Don’t worry. Things will pick up if you ____ yourself.
A．trust
B．rescue
C．sacrifice
D．relax
病例对照研究中，在调查既往的暴露史时，易发生（）
A.入院率偏倚
B.混杂偏倚
C.回忆偏倚
D.信息偏倚
E.失访偏倚
