霍乱临床分期为（）
A.前驱期
B.泻吐期
C.脱水虚脱期
D.恢复期
E.反应恢复期
参考答案：B, C, E
His mother had thought that it would be good for his character to________from home and earn some money on his own.
A．run away
B．take away
C．run away
D．get away
图像编码压缩方法有哪几类？列举出几个有损和无损的压缩方法。
