设m,n是小于20的质数,满足条件|m-n|=2的{m,n}共有()。
A.2组
B.3组
C.4组
D.5组
E.6组
参考答案:C
解析:
小题1:Man should be _____(仁慈的),because man is different from animals.
小题2:Come and see me at your ______(方便).
小题3:The injured man is _____(预计)to recover in a month.
小题4:She helped me with my English without ______(犹豫)
小题5:Lack of skills _____(注定)him to live a poor life.
小题6:We talked as if we were old _____(相识)
小题7:The young man ____(抢劫)her of her bag yesterday.
小题8:Can you think of the _____(可供选择的事物) we would use today?
小题9:The earthquake _____(中断) all the traffic in the area.
小题10:_____ (假定)it rains tomorrow,what shall we do?
与血小板生成有关的细胞是 ()
A.粒细胞
B.巨核细胞
C.浆细胞
D.淋巴细胞
E.单核细胞