肝硬化()
A.支链氨基酸减少,芳香族氨基酸增多
B.AFP水平增高
C.血尿淀粉酶升高
D.白蛋白水平下降
E.直接胆红素升高
参考答案:D
From the dates ________ on the gold coin, we know that it was made 500 years ago. [ ]
A. marking
B. marked
C. to mark
D. to be marked
模样侧面有较小的凸起部分,为便于造型,应采用()造型。
A.整模
B.分模
C.活块
D.组芯