用下列哪一种试剂可正确区分红细胞上真正B抗原与获得性B样抗原()
A.抗AL
B.抗ALB
C.抗B
D.改良BS-1植凝素
E.抗A
参考答案:D
—May I have your pen?
—_________.[ ]
A. Yes, you may
B. No, you may not
C. I have many pens
D. Here you are
下坡路制动失效后,在不得已的情况下,可用车身侧面擦撞山坡,迫使机动车减速停车。