焊接时弧光中的红外线对焊工会造成电光性眼炎。( )
参考答案：错
Ⅱ型呼吸衰竭的吸氧浓度应为（）。
A.25%～35%
B.35%～40%
C.41%～45%
D.51%～55%
E.45%～50%
The food was divided ______ according to the age and size of the child.
A. equally B. individually C. sufficiently D. proportionally
