土石方松实系数是指土石料（）的比例关系。
A.体积
B.质量
C.密度
D.容重
参考答案：A
They had a wonderful time at the party. They ate and ate until no food remained on the table.
A．reminded of
B．was left
C．needed
D．remembered
为协助诊断应选择的检查是
A．血钙、磷测定
B．染色体核型分析
C．血T3、T4、TSH测定
D．脑电图检查
E．尿三氯化铁试验
