下列壶腹周围癌与胰头癌的比较，错误的是（） A.壶腹周围癌的黄疸较胰头癌黄疸出现早

The city government decided to keep the old temple for its historical ________.

A．price

B．cost

C．value

D．usefulness

One of the greatest features of a home ______ is the ability to share one Internet connection simultaneously over two or more computers.

A．computer

B．device

C．network

D．work

下列哪项不是食管贲门失弛缓症的征象（）

A.狭窄段管壁僵硬

B.食管内有液平面现象

C.蠕动减弱或消失

D.钡剂通过缓慢

E.食管下段狭窄，上方扩张明显

The jacket is ______. [ ]

A. a black

B. black

C. an black

D. the black

以人类基因组和拟南芥基因组为例说明你对生物基因组全序列测定工作的科学意义的认识。