This is s picture of Mr. Li’s family. The man in the middle is Mr. Li. The woman is Mrs. Li. They have two sons. The child behind Mr. Li is Li Lei. He’s thirteen. The other in front of Mrs. Li is Li Ming. He is eleven. Li Lei and Li Ming are in the same school, but not in the same grade. Li Lei is in Grade Two. Li Ming is in Grade One. They are good students.

根据短文内容，选择最佳答案。

小题1:There are______ people in the picture.

A．three

B．four

C．five

D．six小题2:Li Lei and Li Ming______ in the same grade.

A．is

B．isn’t

C．are

D．aren’t小题3:Mr. and Mrs. Li have______.

A．one boy and one girl

B．two children

C．two girls

D．one boy小题4:Li Ming is______ brother.

A．Mr. Li’s

B．Mrs. Li’s

C．Li Lei’s

D．We don’t know.小题5: How old are Li Lei and Li Ming?

A．They’re eleven and thirteen.

B．They’re eleven and twelve.

C．They’re twelve and eleven.

D．They’re thirteen and eleven.

患者，男性，49岁，高热、咳嗽1周，查白细胞40×10⁹／L，与慢粒白血病不符的是（）

A.外周血可见幼稚细胞

B.血小板计数正常或增多

C.骨髓中粒系中晚幼细胞多

D.NAP活性增高

E.骨髓增生极度活跃