参考答案:BCD
Derivatives are often likened to gambling by those unfamiliar with the benefits of options mar
第22题: [简答题]论述变质作用因素及其作用。
参考答案:
导致岩石发生变质的主要因素为温度、压力和化学性质活泼的气体和溶液。
(1)温度——系指热力高温而言。其来源:一是主要由地球深部放射性元素的蜕变产生的地热;二是岩浆侵入对其围岩产生的热能;三是新构造运动产生的摩擦热,但对岩石变质影响较小。
温度作用:
a、在高温影响下,岩石质点重新排列,晶粒变粗,发生重结晶作用。
b、受高温影响,还促进原岩矿物成分间的化学反应,产生新的高温变质矿物。
(2)压力——有静压力和定向压力两种。
a、静压力——指的是岩石的荷重。愈往地壳深部,静压力愈大。其作用可以产生体积减小而比重增大的新矿物。
b、定向压力——是由构造运动或岩浆活动所致。在定向压力作用下不仅可以使岩石发生破碎和变形,还可以使其中的柱状或片状矿物垂直压力方向定向排列,形成岩石中的片理构造。
(3)化学性质活泼的气体和溶液——是引起变质作用的化学因素。这是主要源于岩浆中分异出来的物质又渗入围岩中并在一定的温度压力作用下对围岩进行的变质作用。其结果导致岩石物质成分发生变化,产生新的变质矿物。
上述三种因素在变质过程中是相互联系的,但在具体条件下,其中一种因素往往起到主导地位,而其他则处于从属位置。因此,在判定岩石的变质因素时,首先应明了主次关系。
归纳起来,岩石的变质作用可以概括为两点:
A、岩石重结晶或产生新的变质矿物;
B、一些矿物在一定压力下呈定向排列,产生片理构造。
因此,变质岩——是具有一定结构、构造的重结晶岩石。
第23题:[单选题]水臌病人,当腹水大量增加,腹部胀满,大小便不利时,应采用哪种治疗方案( )。
A.标本兼治
B.先治标
C.先治本
D.正治
E.反治
参考答案:B
急则治标指标病甚急,如不及时解决,则会影响及本病的治疗,甚至危及生命,故应先治其标病,待病情缓解后,再治其本病。如水臌病人,当腹水大量增加,腹部胀满,大小便不利的时候,应先治疗标病的腹水。大小便不利,可用利水、逐水法,待腹水减轻、病情稳定后,再调理肝脾,治本病。
第24题: [单项选择]男性,29岁,低热、酱油色尿2个月,体检巩膜黄染,贫血面容,肝、脾不肿大,血红蛋白73g/L,血小板100×109/L,白细胞4.4×109/L,网织红细胞计数0.15,尿隐血阴性。为明确诊断应做哪项检查()。
A. 骨髓检查
B. 血红蛋白电泳
C. Coombs试验
D. 外周血涂片观察红细胞形态
E. Ham试验
参考答案:E
第25题: [单项选择]越鞠丸的组成药物中含有()
A. 苍术、厚朴
B. 苍术、白术
C. 苍术、羌活
D. 苍术、川芎
E. 苍术、黄柏
参考答案:D
第26题:[多选题]横担安装应平整,横担()不应大于20mm。
A.上下歪斜
B.左右扭斜
C.前后不正
D.里外不齐
参考答案:AB
第27题:[判断题]CW-200K型转向架由构架、轴箱定位、弹簧悬挂和基础制动四部分组成。
A.正确
B.错误
参考答案:B
第28题: [填空题]xDSL是DSL(DigitalSubscriberLine)的统称,意即数字用户线路,是以()为传输介质的点对点传输技术。
参考答案:电话线
第29题: [判断题]如果竞争对手实力强大并已采用无差异化市场策略,企业则应采取差异化市场策略。
参考答案:对
第30题: [单项选择]非特异性免疫又称
A. 适应性免疫
B. 获得性免疫
C. 细胞免疫
D. 固有免疫
E. 体液免疫
参考答案:D
第31题:[填空题]《中国铁路南昌局集团有限公司定期票、计次票实施办法》中规定旅客在规定期限内,可凭购买定期票、计次票产品时所使用的乘车人有效身份证件原件,到产品()换取报销凭证。
参考答案:所指定发到站
第32题: [单项选择]一侧三叉神经脊束核的病损表现为()
A. 同侧面部痛温、触觉均障碍
B. 同侧面部呈现洋葱皮样分布的分离性痛温觉障碍
C. 同侧面部呈洋葱皮样分布的痛温觉及触觉障碍
D. 对侧面部呈洋葱皮样分布的痛温觉及触觉障碍
E. 咀嚼无力,下颌反射消失,张口时下颌向同侧偏斜
参考答案:B
第33题: [多项选择]It has been more than 30 years since man first landed on the moon. Some people think that space research is a waste of money. Discuss.
You should write no less than 250 words. Write your article on ANSWER SHEET 2.
参考答案:[参考范文]
For over filly years, a number of nations have been involved in the exploration of outer space. This research has been very costly. Has this money been well-spent or wasted
Some people believe that all or most space research should be eliminated because of its incredible expenses, not only in terms of money, but also in terms of scientific and human resources. These people point out that it cost billions of dollars to send astronauts to the moon, but all that was brought back were worthless rocks. These people say that the money and effort now being wasted in outer space could be spent on more important projects right here on earth, such as providing housing for homeless people, improving the educational system, saving the environment, and finding cures for diseases.
Other people believe that space research has provided many benefits to mankind. They point out that hundreds of useful products, from personal computers to heart pacemakers to freeze-dried foods, are the direct or indirect results of space research. They say that weather and communication satellites, which are also products of space programs, have benefited people all over the globe. In addition to these practical benefits, supporters of the space program point to the scientific knowledge that has been acquired about the sun, the moon, the planets, and even our own earth as a result of space research.
I agree with those people who support space research and want it to continue. Space research, as shown, has already brought many benefits to humanity. Perhaps it will bring even more benefits in the future, ones that we can not even imagine now. Moreover, just as individual people need challenges to make their lives more interesting, I believe the human race itself needs a challenge, and the peaceful exploration of outer space provides just such a challenge.
第34题:[判断题]起重机在作业中出现异常时,应采立即放下吊件,停止运转后进行检修,不得在运转中进行调整或检修。
A.正确
B.错误
参考答案:B
第35题:[单选题]开始缓解的时间为( )
A.12-16h
B.24-48h
C.48-72h
D.3-7天
参考答案:B
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