| Tides are created mainly by the pull of
the moon on the earth. The moon’s pull causes water in the oceans to be a little
deeper at a point closest to the moon and also at a point farthest from the
moon, on the opposite side of the earth. These two tidal "waves" follow the
apparent movement of the moon around the earth strike nearly every coastline at
intervals of about twelve hours and twenty-five minutes. After reaching a high
point, the water level goes down gradually for a little more than six hours and
then begins to rise A. Some coastlines do not have two tides each day. B. Tides usually rise to the same level day after day. C. Tides are not affected by the shape of a coastline. D. The sun has as much effect on tides as does the moon. [单项选择]下列哪项不是妊娠的必备条件？（）
A. 健康的生殖细胞 B. 通畅和功能良好的生殖腔道 C. 适合受精卵种植和发育的子宫内环境 D. 下丘脑—垂体—卵巢轴内分泌调节正常 E. 良好的精神心理状态 [判断题]安全帽使用时，应将下颏带系好，防止工作中前倾后仰或其他原因造成滑落。
A.正确 B.错误 [单项选择]弛张热（）
A. 高热持续，24小时内体温波动不超过1℃ B. 24小时内体温波动超过2℃，但最低未达正常水平 C. 24小时内体温波动于高热与正常体温之间 D. 高热骤起、持续数日后骤退，间歇无热数日，高热重复出现 E. 发热患者体温曲线无规律 [单项选择]SS9型电力机车底架结构采用的材料是（）
A. Q235A B. 耐候钢Q345GNHL C. 16MnR高强度低合金钢 D. Q345A [单选题] Police officers working on the murder have hundreds of families.
A. asked B. researched C. questioned D. demanded [单选题]进行分布式电源相关设备操作的人员应有与现场设备和运行方式相符的（），现场设备应具有明显操作指示，便于操作及检查确认。
A.设备接线图 B.保护接线图 C.现场模拟图 D.系统接线图 [单项选择]初产妇，经阴道分娩，会阴侧切，产后6小时，排尿困难。应采取（）
A. 温水坐浴 B. 留置尿管导尿 C. 肌内注射利尿剂 D. 肌内注射新斯的明，必要时留置导尿管 E. 静脉滴注抗生素 [不定项选择题]共用题干
The Day a Language Died
When Carios Westez died at the age of 76,a language died,too.Westez,more commonly known as Red Thunder Cloud,was the last speaker of the Native American language,Catawba.Anyone who wants to hear various songs of the Catawba can contact the Smithsonian Institution in Washington, D. C.,where,back in the 1940s,Red Thunder Cloud recorded a series of songs for future generations.______(46)They are all that is left of the Catawba language.The language that.people used to speak is gone forever. We are all aware of the damage that modern industry can do to the world's ecology（生态）.However, few people are aware of the impact that widely spoken languages have on other languages and ways of life. English has spread all over the world.Chinese,Spanish,Russian,and Hindi have become powerful langua- ges,as well.______(47)When this happens,hundreds of languages that are spoken by only a few peo- pie die out. Scholars believe there are about 6,000 languages around the world,but more than half of them could die out within the next 100 years.There are many examples.Araki is a native language of the island of Vanuatu,located in the Pacific Ocean.It is spoken by only a few older adults,so like Catawba,Araki will soon disappear.Many languages of Ethiopia will have the same fate because each one has only a few speakers.______(48)In the Americas,100 languages,each of which has fewer than 300 speakers,also are dying out. Red Thunder Cloud was one of the first to recognize the threat of language death and to try to do some-thing about it.He was not actually born into the Catawba.tribe,and the language was not his mother tongue.______(49)The songs he sang for the Smithsonian Institution helped to make Native American music popular.Now he is gone,and the language is dead. What does it mean when a language disappears?When a plant or insect or animal species dies,it is easy to understand what we've lost and to appreciate what this means for the balance of the natural world. However,language is only a product of the mind.To be the last remaining speaker of a language,like Red Thunder Cloud,must be a lonely destiny,almost as strange and terrible as being the last surviving member of a dying species.______(50) ______(48) A.As these languages become more powerful,their use as tools of business and culture increases. B.For the rest of us,when a language dies,we lose the possibility of a unique way of seeing and describing the world. C.These languages don't have many native speakers. D.However,he was a frequent visitor to the Catawba reservation in South Carolina,where he learned the language. E.Papua New Guinea is an extremely rich source of different languages,but more than 100 of them are ir danger of extinction（灭绝）. F.Some people might want to try to learn some of these songs by heart. [单选题]硅胶层析的分离原理是（ ）。
A.吸附 B.分配 C.氢键吸附 D.分子排阻 E.离子交换 [名词解释]三严三实
[单项选择]基站围墙内及靠近基站（）空间内的杂草或树木，应砍除。
A. 1－2米 B. 3－5米 C. 6－7米 D. 10米内 [判断题]带中性线的三相交流调压电路，可以看作是三个单相交流调压电路的组合。
A.正确 B.错误 [单选题]TCAS系统中的参数τ（TAU）指的是（ ）。
A.最大保护距离 B.到最接近点CPA的时间 C.最小保护距离 D.采取机动回避的操作时间 [多选题]铺轨机铺轨后，地面轨排()，吊起的铺轨排不得伸出铺轨机。
A.连接工作尚未完毕 B.施工人员未撤离到线路两侧 C.道砟没有补足 D.挂钩没有系牢 E.前方未压道完成 [单项选择]直肠指诊触及柔软，光滑而有弹性的包块，应考虑为（）。
A. 直肠癌 B. 肛裂 C. 直肠周围脓肿 D. 直肠息肉 E. 外痔 [单选题]微粒贷业务的五级分类标准,逾期1天-90天为( )。
A.损失 B.关注 C.次级 D.可疑 [单选题]三显示自动闭塞区段的连续式机车信号机显示（ ）——要求列车注意运行，表示列车接近的地面信号机显示一个黄色灯光，并预告次一架地面信号机处于关闭状态。
A.一个绿色灯光 B.两个绿色灯光 C.一个黄色灯光 D.两个黄色灯光 [简答题]《上海铁路局客运电梯管理办法》(上铁客〔2015〕386号)对签订客运电梯维保合同有何要求？
[单项选择]某公司与外商签订了一份出口某商品的合同，合同中规定的出口数量为500吨。在溢短装条款中规定，允许卖方交货的数量可增减5%，但未对多交部分货物如何作价给予规定。卖方依合约规定多交了20吨，根据《公约》的规定，此20吨应按（）作价。
A. 到岸价 B. 合同价 C. 离案价 D. 议定价 [填空题]落料时先确定（）刃口尺寸。
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