我国常见的生物地球化学性疾病有碘缺乏病、地方性氟中毒和地方性砷中毒,其发生主要是由于

题型:单项选择题 A2型题

问题:

我国常见的生物地球化学性疾病有碘缺乏病、地方性氟中毒和地方性砷中毒,其发生主要是由于下列哪种原因所致()

A.人体摄入微量元素过多

B.人体摄入微量元素过少

C.地质地理原因使当地居民摄入微量元素过多或过少

D.环境破坏对地质条件影响使人体摄入矿物质异常

E.饮食中某种元素含量异常

考点:公卫执业医师公卫执业医师模拟试题(一)第四单元
题型:单项选择题 A2型题

(2014·安徽皖南八校三联)A positive attitude,________with willingness to seek appropriate help and exercising solid study habits,will do much to determine how well you do in your studies.

A.concluded 

B.combined

C.conducted 

D.connected

题型:单项选择题 A2型题

同氧气一样,氢气也是以高压气态贮存在钢质气瓶中,气瓶外涂有(),并标有“氢气”字样。

A.蓝色

B.灰色

C.绿色

D.蓝灰色

题型:单项选择题 A2型题

前苏联总统戈尔巴乔夫在1991年12月25日辞职演讲中沉重而无奈地说:“我们什么都多:土地、石油和天然气、其他自然资源;智慧和才能也都不错。我们的生活却比发达国家差的多,越来越落在他们的后面。……”这种现象的主要决定性原因是

A.高度集中的政治经济体制弊端

B.经济基础薄弱

C.东欧剧变的直接冲击

D.西方国家长期的经济封锁

题型:单项选择题 A2型题
完形填空(共20小题:每小题1.5分,满分30分)
阅读下面短文,从短文所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。
For Senior 3 students, choosing which college to attend can be the most exciting and thrilling time in their entire school lives. This is also true for an American girl 21  Melanie.
Melanie’s dad, James Porter, who is the chief of police for a Chicago suburb, wants Melanie to 22 nearby Northwestern University, where she’s 23 been accepted. But Melanie, 17,really wants to go to Georgetown University in Washington, D.C, where she’s been wait-listed.
When she gets an unexpected 24 from Georgetown University, she decides to 25 a road trip with a few 26 female friends. Melanie believes it is her first step 27 adulthood.
But 28 the fact that this trip is “girls only”, James isn’t 29 with the prospect(期望) of his little princess 30 the world without him. He wants to protect her, so he joins the girls and hopes he can convince Melanie to go to Northwestern. 31 Melanie’s father only has the best of 32 , his presence 33 an endless series of comic encounters(遭遇).
After following their faulty device   34  into the backwoods (偏远地区), James and Melanie   35  Melanie’s little brother and his pet pig have been hiding in the spare compartment (隔间). What should be a simple change   36  the expensive car rolling down a mountain, forcing them to hike to a nearby hotel…
All these disasters add spice to their trip while along the way a father and a daughter   37  get the chance to really   38  each other.
All parents,   39  they have college students or not, can relate to the bittersweet realization that their kids are growing up.   40  what Melanie and James have done, we all can find the delicate (脆弱的) balance between staying connected and letting go.
小题1:
A.namedB.namingC.namelyD.names
小题2:
A.joinB.sendC.attendD.pass
小题3:
A.stillB.alwaysC.yetD.already
小题4:
A.appointmentB.interviewC.visitD.meeting
小题5:
A.provideB.offerC.takeD.hold
小题6:
A.closingB.closeC.closedD.closely
小题7:
A.towardB.forC.duringD.with
小题8:
A.thoughB.in spiteC.onceD.despite
小题9:
A.satisfyingB.successfulC.comfortableD.meaningful
小题10:
A.seekingB.examiningC.searchingD.exploring
小题11:
A.SinceB.BecauseC.WhileD.When
小题12:
A.intentionsB.attemptsC.effortsD.planning
小题13:
A.comes aboutB.leads toC.calls inD.turns out
小题14:
A.latelyB.lateC.deeplyD.deep
小题15:
A.discoverB.inventC.recognizeD.realize
小题16:
A.succeeds inB.brings inC.results fromD.certainly
小题17:
A.hopefullyB.finallyC.firstlyD.certainly
小题18:
A.agree toB.speak toC.talk toD.turn to
小题19:
A.whetherB.ifC.whatD.why
小题20:
A.AsB.LikeC.ForD.Except
题型:单项选择题 A2型题

齿轮失效诊断方法有两种:简易诊断法、()诊断法。

A、对比

B、测量

C、参数

D、精密

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