普氏系数与单轴拉压强度δA的近以关系为δ压=（）f（MPa）。
A、5
B、10
C、100
参考答案：B
尿毒症患者发生纤维性骨炎的原因是（）
A.尿钙排泄增加
B.尿磷排泄减少
C.继发甲状旁腺亢进
D.活性维生素D3合成障碍
E.营养不良和低蛋白血症
An analyst gathered the following information about Weston Chemical’s stock: Estimated sales per share=$12.19 Earnings before interest, taxes, depreciation, and amortization (EBITDA)=73% Interest expense per share=$ 2.07 Depreciation expense per share=$ 6.21 The tax rate=35% Weston’s estimated Earnings per Share (EPS) is closest to:
A．
B．
C．
