A．睡觉时多梦易醒
B．做事没力气，易疲劳
C．饮食多但体重减轻
D．口渴，饮水多
E．皮肤易生疥感染

A．He thanks Big Foot for his protection from the American soldier
B．He keeps the secret of Big Foot
C．He sympathizes with him after seeing his defeat in boxing
D．He saves Big Foot from the attack of a dog

A．节省时间
B．节省空间
C．节省时间和空间
D．把编译程序进行等价交换