预处理能提高设备的（），是保证产品质量的一项重要措施。
A、弹性
B、塑性
C、耐腐蚀
D、耐高温
参考答案：C
I didn't understand _____, so I raised my hand to ask. [ ]
A. what my teacher says
B. what does my teacher say
C. what my teacher said
D. what did my teacher said
烧伤早期可用水疗治疗创面，水疗的温度以多少为宜（）
A.31℃～33℃
B.33℃～35℃
C.35℃～37℃
D.37℃～39℃
E.39℃～41℃
