肺癌的转移途径有（ ）、（ ）和（ ）。

女，25岁，左 * * 胀痛半月余，体温持续38．5～40．0℃。体检：整个左 * * 红肿明显，皮温较高，表面波动感不明显。

脓肿切开引流，切口的最佳选择是（）。

A."+"字形切口

B."++"字形切口

C.以 * * 为中心放射形切口

D.脓肿局部切口

E.沿 * * 下缘弧形切口

各国采取贸易保护的政策，主要的目是（）。

A.保护本国的幼稚产业

B.出于国际收支的考虑

C.政府保证收人的需要

D.保护本国的瓶颈产业

E.保护本国的就业

直肠与肛管周围容易发生感染的原因是（）

A.排便器官，易污染

B.血运丰富，营养充分

C.周围有数个间隙，其内充满正常肠道菌群

D.周围有数个间隙，其内充满脂肪结缔组织

E.周围有数个间隙，其内充满淋巴血管与脂肪组织

SPF协议基于TCP协议之上实现。

Despite (1) that alcoholic beverages may (2) , a leading medical expert is advising: don’t (3) just yet.
Anybody who’s ever worked in a hospital sees the hospital is full of patients that have (4) disease, but the hospital is not full of patients that have disease related to cholesterol and (5) .
In an (6) in the current New England Journal of Medicine, Dr. Goldberg of Columbia University said it is time to see (7) prevents heart disease. Such a study would give (8) to one group of heart disease patients and not to another, and see (9) .
In the latest study, which followed (10) over a 12-year period, researchers found that those who drank (11) drinks per week (12) of heart attack by (13) compared to (14) .
The lead author, (15) Kenneth Mukamal of Beth Israel Deaconess Medical Center in Boston, insists his study is (16) . For one thing, other studies have not looked at (17) .
Dr. Mukamal says (18) also appear to settle which alcoholic beverage are (19) . "Beer and spirits, beer and liquor, were most ply (20) ."