GB21027标准规定学生用品胶粘剂密度测定温度为()
A.15±1℃
B.20±1℃
C.23±1℃
D.25±1℃
参考答案:C
简述太平天国农民战争的意义
He tries English well. And he practices English every day.
A.to learn ; to speak
B.learning ; speaking
C.to learn ; speaking
D.learning ; to speak