溶出度的测定方法中错误的是
A.溶剂需经脱气处理
B.加热使溶剂温度保持在37℃±0.5℃
C.调整转速使其稳定
D.经不大于1.0μm微孔滤膜滤过
参考答案:D
— Why don't we choose that road to save time?
— The bridge to it ___ [ ]
A. is being repaired
B. is repaired
C. has repaired
D. will be repaired
在碳素钢中,钢的熔点是随含碳量的增加而()