西妥昔单抗的作用靶点是()。
A.VEGF
B.CD20
C.CD52
D.HER-2
E.EGFR
参考答案:E
纸票的使用规定是什么?
There will be ______ space for plants, animals and birds. [ ]
A. little and little
B. less and little
C. little and less
D. less and less