我们在汽车的装备表里面经常看到AT，MT，那么，他们各代表什么？
参考答案：
自动变速箱，手动变速箱。
The Great Wall of China, ______ was built by Chinese ancient people, is regarded as one of the
few wonders of the world.[ ]
A. which
B. that
C. who
D. What
肝硬化晚期发生肝肾综合征的主要原因是
A．泌尿系感染
B．脾功能亢进
C．肾脏有效血容量不足
D．肾单位坏死
E．机体免疫力下降
