A．家用空调
B．普通照明日光灯
C．196L家用电冰箱
D．液晶显示电子计算器
答案：B
— Congratulations! Among the best pictures in the competition, I found ______. When did you draw it?
— During the trip to the Yellow Mountain ______ May. [ ]
A. yours; in
B. yours; on
C. you; in
D. you; on
何为预备热处理？
