一次函数y=2x-3的截距是______．
∵在一次函数y=2x-3中，
b=-3，
∴一次函数y=2x-3在y轴上的截距b=-3．
故答案是：-3．
The first prize winner_______, John was so disappointed that he felt unwilling to know the rest results.[ ]
A. announcing
B. announced
C. was announced
D. had been announced
血管外溶血是指（）。
A.红细胞被单核细胞识别并破坏
B.红细胞被巨噬细胞识别并破坏
C.红细胞被单核-巨噬细胞系统识别并破坏
D.红细胞被中性粒细胞识别并破坏
E.红细胞自溶
