呈圆柱形，略弯曲，表面灰棕色至暗棕色，具较密环节，上端密被暗棕色鳞片状叶柄残基的是（

按可燃气体与氧气混合的方式，焊炬可分为射吸式和（）式。

A、高压

B、等压

C、超低压

D、超高压

根据短文内容，从下框的A---F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余项。

Bill，Emy，Ben，Brigitte和Susan五个人想购买杂志。阅读下面六本杂志(A、B、C、D、E和F ) 的介绍，选出符合各人需要的最佳选项。选项中有一项是多余选项。

注意： 该题要求做在答题卡上。选择E，则涂黑A+B, 选择F，则涂黑A+C

小题1:Bill travels a lot when he was younger．Now that he has stopped his work，he enjoys reading about foreign people，places and customs even if he has already visited that part of the world．

小题2: 

Emy is a university student studying Italian and Politics．She doesn’t have much time to read anything very detailed but she is looking for something with plenty of news and information．

小题3:Ben serves as an assistant to the general manager of an American company in Los Angeles．He is very interested in management and the use of high technology．

小题4:

Up till now Brigitte has never traveled far so this year she has decided to go abroad for the first time．The travel agent suggests that she should read about various countries first before choosing her holiday．

小题5:Susan likes shopping．She is interested in buying clothes and she needs to be offered advice on clothes．

A．Discover

News magazine of science devoted to the wonders and stories of modem science，written for the educated general reader．Published by Disney Magazine Publishing CO．，Discover tells many of the same stories professionals read in Scientific American．A truly delightful family science magazine，each issue brings to light new and newsworthy topics to make dinnertime and water-cooler conversations interesting．

B．World Travel

This weekly magazine can bring the world to your home．Have you ever wondered what the Chinese eat for breakfast? Did you know that the Sahara Desert is getting bigger every year? This fascinating magazine，full of color photographs，is your window to the world．

C．Self

Published by Conde Nast Publications Inc．，Self is a handbook devoted to women’s overall physical and mental health．Every issue contains usable articles such as “Style Lab”．in which wearable clothes are mixed and matched on non—models and the “Eat—Right Road Map”．with tips on how to eat properly．

D．Foreign Parts The weekly magazine tells what you need to know if you’re thinking of traveling．Helpful advice on what to pack and what to buy once you’re there．Lots of color photos to help you choose the best hotel, the cheapest flights and a special guide to different climates each week．

E．Wired

This magazine is designed for leaders in the field of information engineering including top managers and professionals in the computer，business，design and education industries．Published by Conde Nast Publications Inc，Wired often carries articles on how technology changes people’s lives．

F．Europe News

The weekly magazine keeps you in touch with what’s happening．Filled with facts and figures about almost everything you can think of, plus articles by our regular writers on the week’s most interesting news stories．Special back page sums up the news for the busy readers．

对城市供热管网的竖向布置原则叙述正确的选项包括（）。

A.一般地沟管线敷设深度最好浅一些，以减少土方工程量

B.热力管道埋设在绿化地带时，埋深应大于0.2m

C.热力管道与其他地下设备相交时，应在同一水平面上互相通过

D.在地上热力管道与街道或铁路交叉时，管道与地面之间应保留足够的距离，此距离根据通行不同交通工具所需高度来确定

E.热力管道和电缆之间的最小净距为0.5m，电缆地带的土壤受热的附加温度在任何季节都不大于100℃，如果热力管道有专门的保温层，则可减少净距

按照阿彻尔的定义，可以将旅游乘数划分为（）。

A.营业额乘数

B.收入乘数

C.外汇收入乘数

D.产出乘数

E.就业乘数

等渗溶液一定是等压溶液；等压溶液不一定等渗。