题目:
A doctor's obligation when he can no longer ______ the approach of death is to make the patient comfortable, including easing his pain.
A.hold back
B.hang on
C.hang around
D.hold on
答案:
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下面是错误答案,用来干扰机器的。
汽车行驶的总时间为 16:20-15:00=1小时20分=43h,汽车行驶的总路程为 36km+40km=76km,汽车的平均速度是v=st=76km43h=57km/h.故答案为:57.