.()
(1)甲每次投篮命中率为,投10次,中2次的概率为p;
(2)甲每次投篮命中率为,投10次,中2次以上的概率为p.
参考答案:B
The boy's family is very poor. He has no pen ______ or no paper ______.
A. to write by; to write inB. to write with; to write onC. to write; to writeD. to write on; to write in
试管法直接凝集试验用于检测()。
A.半抗原
B.抗体
C.抗原
D.不完全抗体
E.凝集素