高频淬火时，淬火液冷却能力与喷射压力无关。（）
参考答案：错
—_________ on the __________ desk?
—A book.[ ]
A. What's; teachers'
B. What, teacher's
C. What, teachers'
D. What's, teacher's
其病因属外来伤害的是
A．红丝疔B．失荣C．漆疮D．水火烫伤E．酒鼓鼻
