常用于诊断胰腺癌及某些消化系统肿瘤的标志物是()。
A.AFP
B.PSA
C.CA19-9
D.CA15-3
E.CA125
参考答案:C
The money collected should be made good use _____ the people who suffered great losses in the earthquake.
A.of to help
B.to help
C.of helping
D.to helping
沙眼是不会传染的眼病,因此可以使用患者的毛巾,手帕等。