已知函数f（x）=2x3-ax2+6bx在x=1处有极大值7． （1）求f（x）

以下可能是牙源性角化囊肿复发自因（）。

A.手术难以完整摘除

B.衬里上皮生长活跃

C.囊肿部分区域癌变

D.囊壁内有卫星囊

E.口腔粘膜基底细胞增殖

____ in a branch of the tree ___ a note which read "I'll meet you at the School Gate".

A．Sticking; was there

B．Stick; was there

C．To stick; was

D．Stuck; was

At the railway station, themother waved goodbye to her daughter until the train was ____.    [ ]

A. out of sight 

B. out of reach

C. out of order  

D. out of place

慢脾风土虚木亢证临床可见（）

A.面色白，两目凝视

B.身热起伏，语声低怯

C.四肢厥冷，口鼻气冷

D.有解颅等原发病

E.肢体频繁抽痉、强直

[中国工商银行] 建筑工人的工资提高将使( )。

A．新房供给曲线左移并使房子价格上升
B．新房供给曲线右移并使房子价格下降
C．新房供给曲线左移并使房子价格下降
D．新房的需求价格弹性下降