[判断题]杆塔用来支持导线和避雷线，并使之对地及相间保持一定的安全距离。
A.正确
B.错误

[单选题]对称三相电源三角形连接时,线电压是(____)。
A.相电压
B. 3倍的相电压
C. 2倍的相电压
D. 1.732倍的相电压

[单项选择]预制钢筋混凝土构件材料强度等级与《综合单价》不同时，应按对应的（）混凝土单价换算。
A. 现浇
B. 预制
C. 水下
D. 泵送

[单项选择]男，32岁。突然呼吸困难，右侧胸痛，查体：发绀，大汗。既往肺结核病史。男，32岁。突然呼吸困难，右侧胸痛，查体：发绀，大汗。既往肺结核病史，对该患者胸部听诊时可听到 （）
A. 干啰音
B. 金属调叩击音
C. 胸语音
D. 羊鸣音
E. 爆裂音

[单项选择]关于糖尿病的发病机制，描述不正确的是（）
A. 遗传与环境因素共同参与其发病过程
B. 主要与遗传及免疫因素有关
C. 遗传易感性是主要因素
D. 自身免疫起主要作用
E. 环境因素导致胰岛素分泌不足

[不定项选择题]共用题干 Transport and Trade

1.Transport is one of the aids to trade.By moving goods from places where they are plentiful to places where they are scarce,transport adds to their value.The more easily goods can be brought over the distance that separates producer and consumer,the better for trade.When there were no railways,no good roads,no canals,and only small sailing ships,trade was on a small scale.
2.The great advances made in transport during the last two hundred years were accompanied by a big increase in trade.Bigger and faster ships enabled a trade in meat to develop between Britain and New Zealand, for instance.Quicker transport makes possible mass-production and big business, drawing supplies from,and selling goods to,all parts of the globe.Big factories could not exist without transport to carry the large number of workers they need to and from their homes.Big city stores could not have developed unless customers could travel easily from the suburbs and goods delivered to their homes.Big cities could not survive unless food could be brought from a distance.
3.Transport also prevents waste.Much of the fish landed at the ports would be wasted if it could not be taken quickly to inland towns.Transport has given us a much greater variety of foods and goods since we no longer have to live on what is produced locally. Foods which at one time could be obtained only during a part of the year can now be obtained all through the year. Transport has raised the standard of living.
4.By moving fuel,raw materials and even power,for example,electric cables,transport has led to the establishment of industries and trade in areas where they would have been impossible before.Districts and countries can concentrate on making things which they can do better and more cheaply than others and can then exchange them with one another. The cheaper and quicker transport becomes,the longer the distance over which goods can profitably be carried. Countries with poor transport have a lower standard of living.
5.Commerce requires not only the moving of goods and people but also the carrying of messages and information.Means of communication,like telephones,cables and radio,send information about prices,supplies and changing conditions in different parts of the world.In this way,advanced communication systems also help to develop trade. In the trade of modem society the transmission of information plays as important a role as______.
A.to send goods to various parts of the world
B.at any time during the year
C.has greatly promoted trade
D.is it possible to produce on a large scale
E.the transport of goods
F.transport also prevents waste

[判断题]由工作负责人收执的工作票必须始终保存在工作地点。
A.正确
B.错误

[填空题]
Directions: In this section, you will hear a short passage. There are ten missing words in it. Fill in the blanks with the exact words you hear on the tape.