简述柴油机活塞环的类型及作用。
活塞环按其功用的不同,分为气环和油环两种。装在活塞头部上端的是气环,下 端的1~2道是油环。气环主要有两个功用:①用来保证气缸的密封,尽量使气缸内的气体不漏入曲轴箱;②将活塞.上部的热量传给气缸壁。油环的功用是将气缸表面多余的润滑油刮下,不让其窜入燃烧室,同时使气缸壁上润滑油膜均匀分布,改善活塞的润滑条件。
暂无解析
检修工作结束以前,若需将设备试加工作电压,在加压前后应进行哪些工作?
背景:
某既有综合楼进行重新能够修,该工程共12层,层高3.6m,第五层以上为标准层, 每层建筑面积 1200平方米,施工内容宝库哟原有装饰装修工程拆除、新建筑地面、抹灰、门窗、吊顶、轻质隔墙、饰面板(砖)幕墙、涂饰、裱糊与软包、细部工程施工等。工期为2006 年7月6日开工, 2006 年12月28日竣工。
问题:
1、 按照过程控制方法,建筑工程质量验收由哪些过程?
2、 该装饰装修工程子分部质量验收时,应检查有关安全和功能的检测项目有哪些?
3、 该装饰装修工程应何时组织进行室内环境质量验收?
4、 该装饰装修工程观感质量验收包括哪些项目?是如何确定评价?
Part IV Translation:
One of them was from my school days, when our ninth grade teacher, Miss Raber, would pick out words from the Reader’s Digest to test our vocabulary. (Passage Four)
背景:
某高层办公楼工程,框架剪力墙结构,共24层,三层以下为性混凝土结构,顶层局部为网架架构。26施工内容包括结构工程、装饰装修工程,给排水、暖通、电气工程和室外工程施工等2007年3月1日开工,2008 年4月28日主体结构封顶。
问题:
1、 该工程主体结构验收应包括哪些分部工程?
2、 其中混凝土结构子分部工程施工质量验收合格应符合哪些规定?
3、 规范要求哪些部位进行结构实体检测?任何组织?包含哪些内容?
简述安全检查的目的及任务?
Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify moods and actions, our inclination to eat or drink, our aggressiveness or submissiveness, and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine glands and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology as a separate discipline can probably be traced to the experiments of Bayliss and Starling on the hormone secretion. This substance is secreted from cells in the intestinal walls when food enters the stomach; it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secret chemical agents that are conveyed by the bloodstream and regulate distant target organs or tissues. Bayliss and starling demonstrated that chemical integration could occur without participation of the nervous system.
The term “hormone” was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning “to excite or set in motion. The term “endocrine” was introduced shortly thereafter “Endocrine” is used to refer to glands that secret products into the bloodstream. The term “endocrine” contrasts with “exocrine”, which is applied to glands that secret their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrets pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless.
1.What is the author’s main purpose in the passage?
A.To explain the specific functions of various hormones.
B.To provide general information about hormones.
C.To explain how the term “hormone” evolved.
D.To report on experiments in endocrinology.
2.The passage supports which of the following conclusions?
A.The human body requires large amounts of most hormones.
B.Synthetic hormones can replace a person’s natural supply of hormones if necessary.
C.The quantity of hormones produced and their effects on the body are related to a person’s age.
D.The short child of tall parents very likely had a hormone deficiency early in life.
3.It can be inferred from the passage that before the Bayliss and Starling experiments, most people believed that chemical integration occurred only___.
A.during sleep.
B.in the endocrine glands.
C.under control of the nervous system.
D.during strenuous exercise.
4.The word “liberate” could best be replaced by which of the following?
A.Emancipate B.Discharge C.Surrender D.Save
5.According to the passage another term for exocrine glands is___.
A.duct glands
B.endocrine glands
C.ductless glands
D.intestinal glands.
建筑中交通联系部分的作用是什么?包括哪些空间?
低压电力电缆敷设前应做哪些检查和试验?
某项工程,钢筋混凝土大板结构,地下2层,地上18层,基础为筏板基础。目前工程已完工,正准备进行竣工验收。
请回答以下问题:
(1)工程项目进行竣工验收包括哪两方面的内容?
(2)资料员在工程项目上有哪些工作职责?
(3)作为一个资料员除了本身有认真、负责的工作态度外,你认为还需要掌握和了解哪些与工程有关的知识?
Part III Cloze
Directions: There are twenty blanks in the following passage. For each blank there are four choices. Choose the one that best fits into the passage and then marks your answer on the Answer Sheet.
Before the 20th century the horse provided day to day transportation in the United States. Trains were used only for long-distance transportation.
Today the car is the most popular 61 of transportation in all of the United States. It has completely 62 the horse as a means of everyday transportation. Americans use their cars for 63 90 percent of all personal 64 .
Most Americans are able to 65 cars.
The average price of a 66 made car was 1 050 in 1950, 1 740 in 1960 and up to 1 750 67 1975. During this period American car manufacturers set about 68 their products and work efficiency.
As a result, the yearly income of the 69 family increased from 1950 to 1975 70 than the price of cars. For this reason 71 a new car takes a smaller 72 of a family’s total earnings today.
In 1951 73 it took 8.1 months of an average family’s 74 to buy a new car. In 1962 a new car 75 8.3 of a family’s annual earnings. By 1975 it only took 4.75 76 income. In addition, the 1975 cars were technically 77 to models from previous years.
The 78 of the automobile extends throughout the economy 79 the car is so important to Americans. Americans spend more money to 80 their cars running than on any other item.
61. A. kinds B. means C. mean D. types
62. A. denied B. reproduced C. replaced D. ridiculed
63. A. hardly B. nearly C. certainly D. somehow
64. A. trip B. works C. business D. travel
65. A. buy B. sell C. race D. see
66. A. quickly B. regularly C. rapidly D. recently
67. A. on B. in C. behind D. about
68. A. raising B. making C. reducing D. improving
69. A. unusual B. interested C. average D. biggest
70. A. slowest B. equal C. faster D. less than
71. A. bringing B. obtain C. bought D. purchasing
72. A. part B. half C. number D. side
73. A. clearly B. proportionally C. percentage D. suddenly
74. A. income B. work C. plans D. debts
75. A. used B. spend C. cost D. needed
76. A. months’ B. dollars C. family D. year
77. A. famous B. superior C. fastest D. purchasing
78. A. running B. notice C. influence D. discussion
79. A. then B. as C. so D. which
80. A. start B. leave C. keep D. repair