在黑色素瘤中可能阳性的标志物有()。
A.AE1
B.CD20
C.HMB-45
D.S100
E.Vimentin
参考答案:C, D, E
—What time shall we meet tomorrow morning, Kate?
—Let’s ______ nine thirty.
A.make it
B.make that
C.make it in
D.make that at
已知点A的坐标为(2,3),O为坐标原点,连接OA,将线段OA绕点O按逆时针方向旋转90°得OA1,则点A1的坐标为( )
A.(-2,3)
B.(2,-3)
C.(-3,2)
D.(3,-2)