2025年职称英语考试《理工类》考试共65题，分为单选题和多选题和判断题和计算题和简答题和不定项。小编每天为您准备了5道每日一练题目（附答案解析），一步一步陪你备考，每一次练习的成功，都会淋漓尽致的反映在分数上。一起加油前行。

1、Snow RangerThe two things, snow ａｎｄ　mountains, which are needed fｏｒa ski area are the two things that cause avalanches, large mass of snow ａｎｄ　ice crushing down the side of a mountain, often called "White Death. "It was the threat of the avalanche ａｎｄ　its record as a killer of man in the western mountains that created the snow ranger. He first started on avalanche control work in the winter of 1937, 38 at Alta, Utah, in Wasatch National Forest. This mountain valley was becoming well known to skiers. It was dangerous. In fact, more than 120 persons had lost their lives in 1936 ａｎｄ　another 200 died in 1937 as a result of avalanches before it became a majｏｒski area. Thus, development of Alta ａｎｄ　other majｏｒski resorts in the west was dependent upon controlling the avalanche. The Forest Service ｓｅｔout to do it, ａｎｄ　did with its corps of snow rangers. It takes many things to make a snow ranger. The snow ranger must be in excellent physical condition. He must be a good skier ａｎｄ　a skilled mountain climber. He should have at least a high school education, ａｎｄ　the more college courses in geology, physics, ａｎｄ　related fields he has, the better. He studies snow, terrain, wind, ａｎｄ　weather. He learns the conditions that produce avalanches. He learns to forecast avalanches ａｎｄ　to bring them roaring on down the mountainsides to reduce their killing strength. The snow ranger learns to do this by using artillery, by blasting with TNT, ａｎｄ　by the difficult ａｎｄ　skillful art of skiing avalanches down. The snow ranger, dressed in a green parka which has a bright yellow shoulder patch, means safety fｏｒpeople on ski slopes. He pulls the trigger on a 75 mm. Recoilless rifle, skis waist deep in powder testing snow stability, ｏｒtalks with the ski area\'s operatｏｒas he goes about his work to protect the public from the hazards of deep snow on steep mountain slopes. What is the primary duty of the snow ranger?【单选题】

A.To make sure ski area operators are following safety rules.

B.To predict ａｎｄ　control avalanches in mountainous areas.

C.To check skis ａｎｄ　repair them.

D.To forecast the weather.

正确答案:B

答案解析:A:确保滑雪场地的操作员遵守安全规则；B：预测和控制山区的雪崩；C：检查并修理雪橇；D:预测天气。依据常识和前一题判断B最合理。

2、When you are invited, you are supposed to be punctual. 【单选题】

A.in time

B.on time

C.polite

D.courteous

正确答案:B

答案解析:be punctual等于be on time，守时、准时；in time：及时；courteous和polite表示礼貌。

3、Radiocarbon DatingNowadays scientists can answer many questions about the past through a technique called radiocarbon (放射性碳), ｏｒcarbon - 14 dating. One key to understanding how ａｎｄ　why something happened is to discover when it happened.Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at the University of Chicago. An atom of ordinary carbon, called carbon -12, has six protons (质子) ａｎｄ　six neutrons (中子) in its nucleus (原子核). Carbon - 14, ｏｒC - 14, is a radioactive, unstable form of carbon that has two extra neutrons. It returns to a more stable form of carbon through a process called decay (衰减). This process involves the loss of the extra neutrons ａｎｄ　energy from the nucleus.In Libby\'s radiocarbon dating technique, the weak radioactive emissions(放射)from this decay process are counted by instruments such as a radiation detectｏｒａｎｄ　counter. The decay rate is used to determine the proportion of C -14 atoms in the sample being dated.Carbon - 14 is produced in the Earth\'s atmosphere when nitrogen(氮) - 14, ｏｒN - 14, interacts with cosmic rays (宇宙射线). Scientists believe since the Earth was formed, the amount of nitrogen in the atmosphere has remained constant. Consequently, C -14 formation is thought to occur at a constant rate. Now the ratio of C -14 to other carbon atoms in the atmosphere is known. Most scientists agree that this ratio is useful fｏｒdating items back to at least 50,000 years.All life on Earth is made of organic molecules (分子) that contain carbon atoms coming from the atmosphere. So all living things have about the same ratio of C -14 atoms to other carbon atoms in their tissues (组织). Once an organism (有机体) dies it stops taking in carbon in any form, ａｎｄ　the C -14 already present begins to decay. Over time the amount of C - 14 in the material decreases ａｎｄ　the ratio of C - 14 to other carbon atoms goes down. In terms of radiocarbon dating, the fewer C -14 atoms in a sample, the older that sample is.An atom of ordinary carbon has. six protons ａｎｄ　eight neutrons.【单选题】

A.Right

B.Wrong

C.Not mentioned

正确答案:B

答案解析:本题难度不大，答案依据比较明显，主要答案依据在文章第二段第二句：An atom of ordinary carbon，called carbon - 12，has six protons ａｎｄ　six neutrons谈到普通碳原子有6个质子和6个中子，显然，题干和答案依据不符，答案是B。

4、Can you give a concrete example to support your idea?【单选题】

A.specific

B.real

C.special

D.good

正确答案:A

答案解析:你可以举一个具体的例子来支持你的观点吗？本题有一定难度，concrete，常用词汇，指“具体的”，specific 一般指“特殊的”引申意思指“具体的”，这里和concrete，是同义词，special指“特殊的”，没有“具体的”意思，最佳答案是A。

5、The SmogFｏｒover a month, Indonesia was in crisis. Forest fires raged out of control as the country suffered its worst drought fｏｒ50 years. Smoke from the fires mixed with sunlight ａｎｄ　hot dry air to form a cloud of smog. This pollution quickly spread ａｎｄ　within days it was hanging over neighboring countries including Malaysia, Singapore ａｎｄ　Thailand. When the smoke combined with pollution from factories ａｎｄ　cars, it soon became poisonous. Dangerous amounts of CO became trapped under the smog ａｎｄ　pollution levels rose. People wheezed (喘息) ａｎｄ　coughed as they left the house ａｎｄ　their eyes watered immediately. The smog made it impossible to see across streets ａｎｄ　whole cities disappeared as grey soot(烟灰) covered everything. In some areas, water was hosed (用胶管浇) from high-rise city buildings to try ａｎｄ　break up the smog. Finally, heavy rains, which came in November. Put out the fires ａｎｄ　clear the air. But the environmental costs ａｎｄ　health problems will remain. Many people from South-Eastern Asian cities already suffer from breathing huge amounts of car exhaust fumes ａｎｄ　factory pollution Breathing problems could well increase ａｎｄ　many non-sufferers may have difficulties fｏｒthe first time. Wildlife has suffered too. In lowlａｎｄ　forests, elephants, deer, ａｎｄ　tigers have been driven out of their homes by smog. But smog is not just an Asian problem. In fact. was world was first used in London in 1905 to describe the mixture of smoke ａｎｄ　thick fog. Fog often hung over the capital. Sometimes the smog was so thick ａｎｄ　poisonous that people were killed by breathing problems ｏｒin accidents. About 4, 000 Londoners died within five days as a result of thick smog in 1952. The air-pollution index went up to 300 within a few days. 【单选题】

A.Right

B.Wrong

C.Not mentioned

正确答案:C

答案解析:题句意思是“空气污染指数几天内达到300”。文章根本没有提到此事，故选C。