下列关于DNA双螺旋结构模型的叙述中,除了哪一项外其余都是正确的?()A.两股核苷酸

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问题:

下列关于DNA双螺旋结构模型的叙述中,除了哪一项外其余都是正确的?()

A.两股核苷酸链呈反向平行

B.两股链间有严格的碱基配对关系

C.为右手螺旋,每个螺旋含10对碱基

D.极性磷酸二酯键位于双螺旋内侧

E.螺旋直径为2nm

考点:普通考研西医综合全国硕士研究生入学统一考试西医综合真题1990年(暂缺一题)
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元朝最优秀的剧作家是( )

A.李清照

B.窦娥

C.关汉卿

D.汤显祖

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The days of elderly women doing nothing but cooking huge meals on holidays are gone. Enter the Red Hat Society—a group holding the belief that old ladies should have fun.
"My grandmothers didn’t do anything but keep house and serve everybody. They were programmed to do that," said Emily Cornette, head of a chapter of the 7-year-old Red Hat Society.
While men have long spent their time fishing and playing golf, women have sometimes seemed to become unnoticed as they age. But the generation now turning 50 is the baby boomers(生育高峰期出生的人) , and the same people who refused their parents’ way of being young are now trying a new way of growing old.
If you take into consideration feminism(女权主义) , a bit of spare money, and better health for most elderly, the Red Hat Society looks almost inevitable(必然的). In this society, women over 50 wear red hats and purple(紫色的) clothes, while the women under 50 wear pink hats and light purple clothing.
"The organization took the idea from a poem by Jenny Joseph that begins: When I am an old woman, I shall wear purple. With a red hat which doesn’t go," said Ellen Cooper, who founded the Red Hat Society in 1998. When the ladies started to wear the red hats, they attracted lots of attention.
"The point of this is that we need a rest from always doing something for someone else," Cooper said, "Women feel so ashamed and sorry when they do something for themselves. " This is why chapters are discouraged from raising money or doing anything useful. "We’re a ladies’ play group. It couldn’t be more simple," added Cooper’s assistant Joe Heywood.

Who set up the Red Hat Society

A.Emily Cornette.

B.Ellen Cooper.

C.Jenny Joseph.

D.Joe Heywoo

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某施工企业承包了一段36.8km的四车道高速公路沥青混凝土路面工程,路面单幅宽11.25m。路面结构为:基层为两层18cm的石灰粉煤灰稳定碎石;底基层为一层18cm的石灰粉煤灰稳定碎石;沥青混凝土面层为7cm的下面层,6cm的中面层和5cm的SMA表面层,桥上只铺5cm的SMA表面层,隧道内为水泥混凝土路面。

项目经理部人员进场后,完成了经理部的建设和设备的进场工作。施工平面布置示意图如图2-2所示。

合同规定沥青材料由业主提供,地方材料由施工单位自购。材料管理人员在查看过料场、进行了价格比选后,就开始进料。

项目经理部按照各项要求,在完成了一系列的准备工作后,开始施工石灰粉煤灰稳定碎石底基层。施工中,施工人员发现其中一段800m长的底基层出现了大量裂缝和破损,经检查是由于路基质量差所致,路面施工单位拟向路基施工单位提出索赔。

[问题]

上述平面布置方式对稳定料的场内运输费有什么影响说明理由。

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依照我国《公司法》设立的有限责任公司和股份有限公司,都应向社会公开披露财务、生产、经营管理等信息。 ( )

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患者男,45岁,因跌伤致左下肢髌骨骨折入院,拟择期在蛛网膜下腔阻滞下行切开复位内固定术。既往体健,心肺无特殊,无手术外伤史,无药物过敏史。查体:一般情况好,T:36.7℃,P:90次/分,R:20次/分,BP:18/12kPa(140/90mmHg),体重64kg。

提示:蛛网膜下腔用药后30分钟,患者出现恶心呕吐,面色苍白,躁动不安,测血压10/6.5kPa(75/50mmHg),HR:58次/分。上述情况可能的原因是什么()

A.失血过多

B.麻醉药过敏

C.阻滞平面过高,超过T10以上

D.交感神经受阻滞、血管扩张

E.迷走神经相对亢进

F.心衰

G.患者紧张

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