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患者女，56岁，因“右乳外上象限肿物1周”来诊。查体：肿物活动度差，局部皮肤凹陷，右腋下可触及多枚肿大淋巴结。术前粗针穿刺活检诊断为右乳浸润性癌，右腋下淋巴结内转移性低分化腺癌，行右侧 * * 切除+右腋下淋巴结清扫术。大体检查：乳腺肿物2.5cm×1.9cm×1.3cm，边界不清呈放射状，质硬，切面灰白色。

镜下可见肿瘤细胞围绕正常乳腺导管呈靶环状结构的区域，免疫组织化学染色中可用于与浸润性小叶癌的变异型进行鉴别的是（）

A.ER

B.Ki-67

C.E-CD

D.p53

E.CerbB-2

答案

参考答案：C

单项选择题

按照《国家电子政务工程建设项目档案管理暂行办法》的要求，（66）保存期限为永久。

A．监理工作总结

B．监理大纲

C．监理照片

D．监理支付证书
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单项选择题

Drug use is rising dramatically among the nation’s youth after a decade of decline. From 1993 to 1994, marijuana use among young people (1) from 12 to 17 jumped 50 percent. One in five high school seniors (2) marijuana daily. Monitoring the Future, which (3) student drug use annually, reports that negative attitudes about drugs have declined for the fourth year in a row. (4) young people see great risk in using drugs. Mood-altering pharmaceutical drugs are (5) new popularity among young people. Ritalin, (6) as a diet pill in the 1970s and now used to (7) hyperactive children, has become a (8) drug on college campuses. A central nervous system (9) , Ritalin can cause strokes, hypertension, and seizures. Rohypnol, produced in Europe as a (10) tranquilizer, lowers inhibitions and suppresses short-term memory, which has led to some women being raped by men they are going out with. (11) taken with alcohol, its effects are greatly (12) . Rock singer Kurt Cobain collapsed from an (13) of Rohypnol and champagne a month before he committed (14) in 1994. In Florida and Texas, Rohypnol has become widely abused among teens, who see the drug as a less expensive (15) for marijuana and LSD. Alcohol and tobacco use is increasing among teenagers, (16) younger adolescents. Each year, more than one million teens become regular smokers, (17) they cannot legally purchase tobacco. By 12th grade, one in three students smokes. In 1995, one in five 14-year-olds reported smoking regularly, a 33 percent jump (18) 1991. Drinking among 14-year-olds climbed 50 percent from 1992 to 1994, and all teens reported substantial increases in (19) drinking. In 1995, one in five 10th graders reported having been drunk in the past 30 days. Two-thirds of high school seniors say they know a (20) with a drinking problem.

19（）

A.serious

B.severe

C.grave

D.heavy
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