关于次要组织相容性抗原正确的是()A.由Y染色体基因编码的H-Y抗原属于mHA B.

题型:多项选择题

问题:

关于次要组织相容性抗原正确的是()

A.由Y染色体基因编码的H-Y抗原属于mHA

B.引起慢而强的移植排斥反应

C.在同卵双生子之间的器官移植不引起移植排斥反应

D.在供、受体间MHC分子完全相同者,仍可引起移植排斥反应

E.鉴定mHA型别有利于选择骨髓移植供者

考点:临床医学检验十四、肿瘤免疫及移殖免疫十四、肿瘤免疫及移殖免疫题库
题型:多项选择题

有一种碳纳米管的直径只有1.4nm,5万个这种碳纳米管并排起来只有一根头发丝那么粗,则这种碳纳米管的直径约等于      m,一根头发丝的直径等于     nm,合      μm。

题型:多项选择题

下列物质属于纯净物的是(  )

A.加热KMnO4后的残余固体

B.液氧

C.食盐水

D.清新的空气

题型:多项选择题

阅读下列短文:从每题所给的A、B、C、D四个选项中,选出最佳选项,将正确的选项涂在答题卡上。B

Surviving Hurricane Sandy(飓风桑迪)

Natalie Doan,14, has always felt lucky to live in Rockaway, New York. Living just a few blocks from the beach, Natalie can see the ocean and hear the wave from her house. “It’s the ocean that makes Rockaway so special,” she says.

On October 29, 2012, that ocean turned fierce. That night, Hurricane Sandy attacked the East Coast, and Rockaway was hit especially hard. Fortunately, Natalie’s family escaped to Brooklyn shortly before the city’s bridge closed.

When they returned to Rockaway the next day, they found their neighborhood in ruins. Many of Natalie’s friends had lost their homes and were living far away. All around her, people were suffering, especially the elderly. Natalie’s school was so damaged that she had to temporarily attend a school in Brooklyn.

In the following few days, the men and women helping Rockaway recover inspired Natalie. Volunteers came with carloads of donated clothing and toys. Neighbors devoted their spare time to helping others rebuild. Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped in powerless high-rise buildings.

“My mom tells me that I can’t control what happens to me,” Natalie says. “but I can always choose how I deal with it.”

Natalie’s choice was to help.

She created a website page matching survivors in need with donors who wanted to halp. Natalie posted introduction about a boy named Patrick, who lost his baseball card collecting when his house burned down. Within days, Patrick’s collection was replaced.

In the coming months, her website page helped lots of kids: Christopher, who received a new basketball; Charlie, who got a new keyboard. Natalie also worked with other organizations to bring much-need supplies to Rockaway. Her efforts made her a famous person. Last April, she was invited to the White House and honored as a Hurricane Sandy Champion of Change.

Today, the scars(创痕)of destruction are still seen in Rockaway, but hope is in the air. The streets are clear, and many homes have been rebuilt. “I can’t imagine living anywhere but Rockaway,” Natalie declares. “My neighborhood will be back, even per than before.”

When Natalie returned to Rockaway after the hurricane ,she found().

A.some friends had lost their lives

B.her neighborhood was destroyed

C.her school had moved to Brooklyn

D.the elderly were free from suffering

题型:多项选择题

耳带状疱疹与以下哪两个脏腑关系最为密切()

A.肝

B.脾

C.肾

D.胆

E.心

题型:多项选择题

男性,27岁,3周前发热伴咽痛流涕,1周来感活动后心悸、气促,查体:双肺无异常,心界不大,心率105次/分,偶有期前收缩,心音减弱,各瓣区无杂音,心电图示偶发室性期前收缩,白细胞6.3×10/L,CPK-MB升高。最可能的诊断是()

A.急性心肌炎

B.不稳定型心绞痛

C.扩张型心肌病

D.炎症性心肌病

E.急性心包炎

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