更多"Nowadays, with the developments of "的相关试题:
[多项选择]Nowadays, with the developments of science and technology, the population is increasing quickly. The increase of population causes some problems. The whole world is faced with such a problem and the problems caused by it. What do you think of it Show your opinion and write an article of about 400 words on the following topic: Should College Students Start Enterprises during Their Studying Period
In the first part of your writing you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion with a summary.
Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks.
Write your essay on the ANSWER SHEET.
[多项选择] THE EFFECT OF SCIENCE AND
TECHNOLOGY ON OUR LIVES
In the first part of your writing you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion or a summary.
Marks will be awarded for content, organization, grammar and appropriacy. Failure to follow the above instructions may result in a loss of marks.
Write your essay on ANSWER SHEET FOUR.
[简答题]
A recent phenomenon in present-day science and technology is the increasing trend toward "directed" or "programmed" research; i. e. research whose scope and objectives are predetermined by private or government organizations rather than researchers themselves. Any scientist working for such organizations and investigating in a given field therefore tends to do so in accordance with a plan or program designed beforehand.
At the beginning of the century, however, the situation was quite different. At that time there were no industrial research organizations in the modern sense, the laboratory unit consisted of a few scientists at the most, assisted by one or two technicians. 47) Nevertheless, the scientist, often working with inadequate equipment in unsuitable rooms, was free to choose any subject for investigation he liked, since there was no predetermined program to which he had to conform.
48) As the century developed, the inc
[单项选择]
Radiocarbon Dating
Nowadays scientists can answer many questions about the past through a technique called radiocarbon (放射), or carbon-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,or C-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 detector and counter. The decay rate is used to determine the proportion of C-14 atoms in the ’sam
A. Right
B. Wrong
C. Not mentioned
[简答题]Nowadays advertisements are found everywhere.
2. Advertisements fill almost every minute of a day.
3. No one can avoid being influenced by ads.
{{B}} My Thoughts about Advertising{{/B}}
[单项选择]Nowadays many people would like to
A. go to the tailor’s.
B. buy ready-made clothes.
C. order clothes online.
[单项选择] Radiocarbon Dating
Nowadays scientists can answer many questions about the past through a technique called radiocarbon (放射性碳), or carbon-14, dating. One key to understanding how and by something happened is to discover when it happened.
Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at he 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, or C-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 he 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 detector and counter. The decay rate is used to determine the proportion of C-14 atoms in the samp
A. Right
B. Wrong
C. Not mentioned
