远红外加热技术按温度等级分为低温加热、高温加热二个等级。
参考答案：错
解析：远红外加热技术按温度等级分为低温加热、中温加热、高温加热三个等级。
已知抛物线y2=8x，O是坐标原点，F是焦点，P是抛物线上的点，使得△POF是直角三角形，则这样的P点共有（ ）
A．0个
B．2个
C．4个
D．6个
It struck me like lightning how difficult it must have been for a woman to get a medical training so long ago _____ women’s education was always placed second to men’s.
A．while
B．when
C．until
D．as
