正常人类的体细胞具有（）染色体。

语法填空

     One evening, I came across one of son's papers with a  failing grade.I almost started to yell his name    1   I suddenly  remembered he was in bed asleep.It was his   2    (nine)  year of school and his

academic career seemed to be in ruins, so  I was angry.But I put the paper aside and turned to the   3    

one, at the top of which were written "My dad".It was a poem   about me,   4   included the time I had to

leave work to take him to the hospital because he    5   (break) his finger.So careless was I   6   I had

forgotten all about that.He talked about how I wrestled with him in the evenings and    7   good many

other things.That paper was suddenly not nearly as  important as it had been a few minutes    8  .I don't

know if he planted the poem next to the failing grade to    9   (soft) the blow, but it worked.Instead of a

severe lecture, I talked to him about the poem as well as the failed homework, and it began to make

sense to me that I could include praise along   10   constructive criticism.

女患者，25岁，停经56天，恶心呕吐两周，加重4天，食入即吐，呕吐清涎，口淡无味，神疲思睡，舌淡，苔白润，脉缓滑无力，治疗最佳方剂是（）

A.小半夏加茯苓汤

B.六君子汤

C.香砂六君子汤

D.苏叶黄连汤

E.温胆汤

催化mRNA的3’端PolyA尾生成的酶是

A．内含子
B．多顺反子
C．RNA聚合酶Ⅱ
D．原核RNA聚合酶口
E．多聚A聚合酶

烟叶随着成熟的增加，烟碱含量（）。

A．减少

B．不变化

C．降解

D．提高