游荡yóu dànɡ
参考答案：
①闲荡。②漫游、徘徊、流浪。③游逛。
Though the situation is rather serious, financial leaders are still ________ about global economy.[ ]
A. positive
B. negative
C. active
D. passive
瓶阀冻结时，应把气瓶移至较温暖的地方，用—解冻。
A.温水
B.开水
C.蒸汽
D.明火
