以下哪种情况是彩色多普勒血流显像仪质量好的主要标志() A.灰阶显像分辨率高 B.检

题型:单项选择题

问题:

以下哪种情况是彩色多普勒血流显像仪质量好的主要标志()

A.灰阶显像分辨率高

B.检出低速血流的敏感度高,抗低频噪音信号能力强

C.可连接外设多

D.功能多、性能价格比高

E.具备升级潜能

考点:儿外科住院医师超声科超声科题库
题型:单项选择题

什么叫定时付款?

题型:单项选择题

患者家属加入医患关系中带来的负面效应是()

A.加重了医务人员的责任

B.增加了对医务人员的监督

C.有时会损害患者正当权益

D.出现了从属关系

E.加大了社会意义

题型:单项选择题
完形填空(共20小题;每小题1分,满分20分)
阅读下面短文,掌握其大意,然后从各题所给的四个选项中,选出最佳选项 。
Water and its importance to human life were the centre of the world’s attention last week. March 22 was World Water Day and     36    the theme “Water for Life”.
There are more than one billion people in the world who live without     37    drinking water. The United Nations      38    to cut this number in half by 2015.
Solving such a big problem seems like a(n)     39    challenge. But everyone,     40    teenagers, can do something to help. A teenage girl in the US has set an example to the     41  of her age around the world.
Rene Haggerty, 13, was awarded the 2004 Gloria Barron Prize for her work—     42    discarded(废弃的) batteries(电池)which pollute water.
In 2003, Haggerty went on a field trip to the Great Lakes Science Centre in Ohio. There she saw an exhibit about how     43    in old batteries harm the water of Lake Erie.
Haggerty learnt that     44     the batteries was an easy solution. “I think everybody can do it, because everyone     45    batteries, and it can make a big difference.” With these words, she began to     46    awareness in her area.
She     47     her county government and school board. She got permission to start a recycling programme in schools    48   the public library, hospital, and churches. With help from her family, friends and local waste-management    49   , she gathered containers, arranged transportation, and made a(n)     50    video.
Over the past two years, she collected four tons of batteries and drew the attention of officials, who were in charge of a battery recycling programme but had made     51   progress.
When asked     52    she feels like a hero, Haggerty is quite ____53   . “Not really. Well, maybe for the fish I saved!”
Every year the Gloria Barron Prize     54  young Americans aged 8 to 18 who have shown leadership and courage in     55    the public and the planet. Each year ten winners receive US $ 2,000 each, to help with their education costs or their public service work.
小题1:
A.hadB.gaveC.wroteD.discussed
小题2:
A.enoughB.safe C.muchD.polluted
小题3:
A.asksB.ordersC.hopes D.ensures
小题4:
A.good B.strongC.importantD.unreal
小题5:
A.especiallyB.sometimesC.evenD.seldom
小题6:
A.boysB.othersC.studentsD.grown-ups
小题7:
A.collecting B.sellingC.buyingD.using
小题8:
A.thingsB.chemicalsC.waterD.air
小题9:
A.makingB.recycling C.reducing D.handling
小题10:
A.uses B.hasC.throws D.needs
小题11:
A.tell B.increaseC.spread D.inform
小题12:
A.talked to B.listened toC.heard fromD.thought about
小题13:
A.andB.besideC.as well asD.as good as
小题14:
A.officials B.workersC.clerksD.experts
小题15:
A.industrial B.agricultural C.scientificD.educational
小题16:
A.muchB.noC.someD.little
小题17:
A.ifB.howC.whenD.why
小题18:
A.proudB.glad C.modestD.worried
小题19:
A.praisesB.helpsC.supportsD.honors
小题20:
A.awardingB.savingC.servingD.favoring
题型:单项选择题

某化学课外活动小组在实验室设计了如下图所示的实验装置,进行“氨的催化氧化”实验。

(1)A中制取气体时只用了一种药品,则该药品最好是______________(填化学式),图中空白处所需仪器应为____________________(选填下列仪器编号,固定装置省略)。

(2)该装置补充完整后,仍然存在一定缺陷,试从安全与环保的角度来考虑,对该装置进行改进①_____________________________;  ②____________________________。

(3)按照改进后的装置进行实验,请完成以下问题:

①装置B的作用______________________________  ;

②写出C中发生反应的化学方程式:______________________________  ;

③若A、B处试剂足量,则装置D中可以观察到的实验现象有_______________ 。

题型:单项选择题

计算机感染病毒后应该采取适当的措施阻止病毒的进一步感染,下面的操作中无效的是 (28)

A.对硬盘重新格式化

B.下载并安装操作系统的安全补丁

C.删除感染病毒的文件

D.将机器关闭一段时间后再打开

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