函数f(x)＝alnx＋x在x＝1处取得极值，则a的值为( ▲ )
A．
B．－1
C．0
D．－
答案：B
In relation to defences in the tort of negligence, explain the meaning of:
(a) contributory negligence; (5 marks)
“吐下之余，定无完气”说明哪一项病理变化
A．气血两虚
B．气随血脱
C．气不化水
D．气随津脱
