采样精密度与被采样煤的变异性、制样和化验误差、采样单元数、子样数和试样量无关()
参考答案:错
宋代农民的文化生活不断丰富和改善原因,下列不正确是[ ]
A.多数农民不能够维持温饱生活
B.雕版印刷的普及
C.书籍等文化用品逐渐在农村流行
D.农村经济水平不断提高
— Shall we have a talk with her tonight?
— There is no _______ talking to her. She will never listen.
A.good
B.value
C.point
D.worth