菊花是我国特产的传统名花，寓意（）、顽强长寿和傲雪凌霜等。A、弱不禁风 B、攀附权贵

In order to catch up with her classmates, _____.

A．a lot of books were bought by Mary’s mother

B．Mary’s father helped her with her lessons

C．Mary worked hard at her lessons around the clock

D．Mary’s classmates helped her a lot

人体的最高级神经中枢位于[ ]

A．大脑

B．脊髓

C．小脑

D．脑

极化曲线越陡峭，电极极化程度越（）。

A、大

B、正

C、小

D、负

下列疾病会引起骨髓巨核细胞减少的是：（）

A.血友病

B.缺铁性贫血

C.ITP

D.再生障碍性贫血

E.巨幼细胞贫血

我国最著名的古代石刻——石鼓文就属于（）文字。