大黄降低血尿素氮和肌酐作用的现代应用是（）
A.利尿消肿
B.抗肿瘤
C.降血脂
D.氮质血症
E.抗炎
参考答案：D
You can't imagine what great trouble I had ____ his address.[ ]
A. to find
B. of finding
C. finding
D. about finding
预防性树脂充填类型B使用的充填材料是
A．不含填料的窝沟封闭剂B．含填料的窝沟封闭剂C．玻璃离子水门汀D．流动树脂E．后牙复合树脂
