消化道癌尤其是大肠癌的肿瘤标志物是()。
A.AFP
B.CEA
C.ACP
D.CA19-9
E.TP5
参考答案:B
My father is good at _______stories.
A.tell B.tells C.telling
执行下列程序段,结果是( )。 #include<iostream.h> void main( ) { int x=40; char y=''C''; int n; n=(x&0xff)&&c(y> ''B''); cout < < n;}
A.0
B.1
C.2
D.3