霍乱的主要临床症状有（）
A.脱水
B.循环衰竭
C.酸碱失衡
D.呕吐
E.急骤、剧烈腹泻
参考答案：A, B, C, D, E
经济全球化，使世界经济正在成为一个相互依赖、相互联系的整体。( )
— Did Miss King see your report card?
— Yes, she did. The smile on her face showed she was very _____. [ ]
A. upset
B. worried
C. pleased
